Thunder Mountain Gold, Inc. News Releases

Thunder Mountain Gold Announces Change of Independent Registered Public Accounting Firm

Tue, 09 Jun 2026 11:13:00 -0400

Boise, Idaho--(Newsfile Corp. - June 9, 2026) - Thunder Mountain Gold, Inc. (OTCQB: THMG) (TSXV: THM) ("Thunder Mountain Gold" or the "Company") announced today Assure CPA, LLC ("Assure"), the Company`s long time Independent Registered Public Accounting Firm, has been acquired by Sadler, Gibb & Associates, LLC ("Sadler Gibb"). Consequently, Assure will be resigning its role as the Company`s Independent Registered Public Accounting Firm. This resignation follows the sale of substantially all of Assure's assets to Sadler, Gibb & Associates, LLC ("Sadler Gibb").

As part of the transaction, Assure has ceased its operations as a public accounting firm, and the professionals who have served the Company are continuing in their roles at Sadler Gibb. The Company has filed a Current Report on Form 8-K under Item 4.01 (Changes in Registrant's Certifying Accountant). Additionally, the Company has filed all related documents on SEDAR+ in Canada, along with the issuance of this news release announcing the change in compliance with TSX-V regulations.

About Sadler Gibb and Associates, LLC

Sadler Gibb is a Utah-headquartered, PCAOB-registered public accounting firm with offices in Salt Lake City and Draper. The firm was founded approximately 17 years ago by partners Big Four, Global, and regional practices and wanted to combine that level of technical depth with the responsiveness and senior-partner access of a boutique firm. The firm now serves more than 500 clients across tax, assurance, advisory, and financial services, with particular strength in SEC reporting, M&A , and complex technical accounting. Memberships include the PCAOB, AICPA, UACPA, and CPAB. Core competencies. PCAOB-registered audits of public companies; SEC filings, S-1 registrations and NASDAQ up-listings; complex technical accounting (revenue recognition, stock-based compensation, convertible debt and embedded derivatives, business combinations, goodwill and asset impairment, variable interest entities); M&A and transaction advisory; federal and multi-state tax compliance; IRS problem resolution; advisory and CFO-level services.

Regarding Thunder Mountain Gold, Inc.

Thunder Mountain Gold Inc., founded in 1935, is a junior exploration company with interests in base and precious metals projects in the western United States. It had its start in the Thunder Mountain Mining District in central Idaho. Today, its principal asset is the South Mountain Mine, a historic former Anaconda Copper Company development of zinc, silver, gold, lead, and copper located on private land in Owyhee County, Idaho. The Company also owns 100% of the Trout Creek Project, a gold exploration project in Nevada adjacent to and surrounded by Nevada Gold Mines, a Barrick-Newmont joint venture. For more information, please visit the Company's website at www.Thundermountaingold.com, and at www.SEC.gov and www.sedarplus.ca.

Cautionary Note to Investors

This news release is intended for release in the United States only. Neither the TSX Venture Exchange, the OTCQB, nor either of its Regulation Services Provider (as that term is defined in policies of the TSX Venture Exchange) accepts responsibility for the adequacy or accuracy of this release.

For further information, please contact:

Thunder Mountain Gold, Inc.
Eric T. Jones
President and Chief Executive Officer
Eric@thundermountaingold.com
Office: (208) 658-1037

To view the source version of this press release, please visit https://www.newsfilecorp.com/release/300753

Thunder Mountain Gold Significantly Increases Land Position at The South Mountain Property

Mon, 01 Jun 2026 09:02:00 -0400

Boise, Idaho--(Newsfile Corp. - June 1, 2026) - Thunder Mountain Gold, Inc. (OTCQB: THMG) (TSXV: THM) ("Thunder Mountain Gold" or the "Company") is pleased to announce that it has secured a 20-year mineral lease ("Lease") with the Idaho Department of Lands ("IDL" or the "Lessor"), through its wholly owned subsidiary, South Mountain Mines Inc., covering approximately 3,675 acres of state-owned land adjacent to the Company's South Mountain Mines Property in Owyhee County, Idaho. The Lease expands the Company's district-wide land position at South Mountain and supports continued exploration, development, and potential mining across a highly prospective area.

The Lease has an initial 20-year term, commencing March 1, 2026, and expiring February 28, 2046, with extension rights subject to Idaho law and agreement with the Lessor. The Lease and associated commitments underscore the Company's long-term investment in the project and its contribution to Idaho's critical minerals development. The mineral Lease was approved by the Idaho State Land Board and signed by Governor Brad Little on May 20, 2026.

Eric T. Jones, President and CEO of Thunder Mountain Gold, commented: "This Lease significantly strengthens our South Mountain land position and advances our district-wide exploration strategy. With this expanded footprint, we are better positioned to evaluate the broader mineral potential of the South Mountain Complex and pursue opportunities to enhance long-term project value. We appreciate the State of Idaho's constructive support for responsible resource development."

Thunder Mountain Gold has continuously advanced the South Mountain Mine and surrounding district since 2007. While work through 2024 focused primarily on the underground silver-rich polymetallic resource, the broader surrounding area remained comparatively underexplored. The Company's 2025 exploration work consisting of geophysical surveys, field mapping and sampling has identified encouraging porphyry potential across the broader project area. Follow-up mapping and geophysical work have highlighted multiple trends within the newly consolidated land package, and the Company plans additional geophysical programs to further assess these high-priority targets.

About the Idaho Department of Lands

The Idaho Department of Lands manages over 3.4 million acres of state endowment trust land, with a mandate to maximize revenue for the benefit of public schools and other institutions. Mineral leasing is a key component of this mission, contributing to Idaho's economic development and educational funding.

Additional Land Acquisition

The Company has also purchased 113 acres of private land contiguous with the main mine area. This acquisition includes strategic exploration ground associated with the Gold Breccia target and supports continued advancement of the South Mountain project. In addition, the Company has recently located 423 mineral lode claims on adjoining BLM lands totaling approximately 8,200 acres and secured a lease on an additional 1,073 acres of private land in and around the project area.

With the State of Idaho lease, the above land acquisition and new mining claims, the property position has increased by a total of 13,061 acres or about twenty (20) square miles.

Commitment to Responsible Stewardship

Throughout its 90-year history, the Company has maintained a strong commitment to responsible environmental stewardship across its land holdings in Idaho. In 2005, the Company sold the Thunder Mountain Mine in Valley County, Idaho, to the U.S. Forest Service and donated thousands of acres for conservation through Trust for Public Land, a national nonprofit organization dedicated to expanding access to the outdoors.

The Company remains committed to complying with all regulatory requirements and implementing best practices to ensure environmental stewardship and community engagement through each step in the project.

The South Mountain Project

The South Mountain Mine is a polymetallic development project containing high-grade zinc, silver, gold, and copper, located on private land approximately 70 miles southwest of Boise, Idaho. The project was intermittently mined from the late 1940s through the late 1960s, most notably by Anaconda Copper, and includes more than 4,000 feet of rehabilitated underground development that is MSHA compliant. Thunder Mountain Gold has advanced the project since 2007 and invested approximately US$25 million to date. Historic test mining and processing focused primarily on high-grade Carbonate Replacement Deposit (CRD) and skarn zones that remain open at depth and along strike. According to historical smelter records, approximately 53,642 tons of mineralized material were mined and direct shipped to the smelter at average realized grades of 14.5% Zn, 10.6 o.p.t. Ag (363.42 g/t Ag), 0.058 o.p.t. Au (1.98 g/t Au), 1.4% Cu, and 2.4% Pb (see SK-1300 Technical Resource Statement and NI 43-101 Technical Report: Updated Mineral Resource Estimate for the South Mountain Project, dated December 31, 2023, and December 15, 2023, respectively). More information is available on the Company's website and at www.SEC.gov and www.sedarplus.ca.

Technical Data in this Release

The technical information in this news release was reviewed and approved by Steven A. Osterberg, Ph.D., P.G., Q.P. consulting geologist, and a "Qualified Person" as defined by the U.S. SK-1300 regulations & National Instrument 43-101 (Canada) standards.

Regarding Thunder Mountain Gold, Inc.

Thunder Mountain Gold Inc., founded in 1935, is a junior exploration company with interests in base and precious metals projects in the western United States. It had its start in the Thunder Mountain Mining District in central Idaho; in 2005 the Company sold its patented and unpatented mining claims and interest to the Trust for Public Lands and the US Forest Service. Today, its principal asset is the South Mountain Mine, a historic former Anaconda Copper Company development of zinc, silver, gold, lead, and copper located on private land in Owyhee County, Idaho. The Company also owns 100% of the Trout Creek Project, a gold exploration project in Nevada adjacent to and surrounded by Nevada Gold Mines, a Barrick-Newmont joint venture. For more information, please visit the Company's website at www.Thundermountaingold.com.

Cautionary Note to Investors

For further information, please contact:

Thunder Mountain Gold, Inc.
Eric T. Jones
President and Chief Executive Officer
Eric@thundermountaingold.com
Office: (208) 658-1037

To view the source version of this press release, please visit https://www.newsfilecorp.com/release/299580

Thunder Mountain Gold Announces Bylaw Amendment and AGM Voting Results

Thu, 05 Feb 2026 16:56:00 -0500

Boise, Idaho--(Newsfile Corp. - February 5, 2026) - Thunder Mountain Gold, Inc. (OTCQB: THMG) (TSXV: THM) ("Thunder Mountain Gold" or the "Company").

The Board of Directors (the "Board") of the Company approved an amendment to the Company's Bylaws (the "Bylaws"), effective prior to the Company's annual meeting of shareholders held on January 28, 2026 (the "Annual Meeting"). The sole purpose of the amendment was to amend the quorum requirements of the meetings of shareholders, from a majority of the outstanding shares of the Company entitled to vote, to one-third (1/3) of the outstanding shares of the Company entitled to vote, represented in person or by proxy.

The Annual Meeting was held on January 28, 2026, pursuant to a definitive notice and proxy statement filed with the SEC on December 23, 2025. The Company's shareholders approved the election of all directors, and the appointment of Assure CPA, LLC as the Company's auditor for the ensuing fiscal year. The directors elected to serve on the Board for the ensuing year are Eric T. Jones, Ralph Noyes, Doug Glaspev, and James Sabala.

Regarding Thunder Mountain Gold, Inc.

Thunder Mountain Gold Inc., a junior exploration company founded in 1935, owns interests in base and precious metals projects in the western U.S. The Company's principal asset is The South Mountain Mine, a historic former Anaconda Copper Company development of zinc, silver, gold, lead, and copper, located on private land in Owyhee County Idaho. Thunder Mountain Gold also owns 100% of the Trout Creek Project - a gold exploration project located along the western flank of the Shoshone Mountain Range in the Reese River Valley, adjacent to and surrounded by Nevada Gold Mines, a Barrick and Newmont Gold, Inc. joint venture. For more information on Thunder Mountain Gold, please visit the Company's website at www.Thundermountaingold.com.

Cautionary Note to Investors

For further information, please contact:

Thunder Mountain Gold, Inc.
Eric T. Jones
President and Chief Executive Officer
Eric@thundermountaingold.com
Office: (208) 658-1037

To view the source version of this press release, please visit https://www.newsfilecorp.com/release/282931

Thunder Mountain Gold Announces Market Making Services Agreement

Mon, 29 Dec 2025 13:54:00 -0500

Boise, Idaho--(Newsfile Corp. - December 29, 2025) - Thunder Mountain Gold, Inc. (OTCQB: THMG) (TSXV: THM) ("Thunder Mountain Gold" or the "Company") reports that it has entered into a market making services agreement (the "Agreement") with Independent Trading Group (ITG), Inc. ("ITG") effective as of April 1, 2025. ITG is a Toronto based independent dealer member registered with the Canadian Investment Regulatory Organization. Under the Agreement, ITG will provide market making services on behalf of the Company during the term of the Agreement. ITG will carry out the market making services by appointing an approved trader within ITG who has sufficient experience to effectively perform and manage the market making activities. In consideration for providing the market making services, the Company will pay to ITG a monthly fee of CDN$6,000 per month during the term of the Agreement. ITG does not own, directly or indirectly, any interest in or common shares of the Company or have right, directly or indirectly, to acquire any interest in or common shares of the Company. The Company will pay the monthly market making fee to ITG from its available cash and working capital resources. The initial term of the Agreement is a term of one month, subject to automatic renewal for additional terms of one month each and subject to the right of each of the Company and ITG to terminate on 30 days prior notice to the other. The Company will be evaluating the duration of this Agreement in early 2026.

Regarding Thunder Mountain Gold, Inc.

Forward-Looking Statements

This press release contains forward-looking statements that are based on the beliefs of management and reflect the Company's current expectations. Generally, forward-looking statements can be identified by the use of forward-looking terminology such as "plans", "expects", "is expected", "budget", "scheduled", "estimates", "forecasts", "intends", "anticipates", "believes" or variations of such words and phrases or statements that certain actions, events or results "may", "could", "would", "might" or "will be taken", "occur" or "be achieved" or the negative connotation thereof. The forward-looking statements are based on certain assumptions which could change materially in the future. By their nature, forward-looking information involves known and unknown risks, uncertainties and other factors that may cause actual results, performance or achievements to be materially different from any future results, performance or achievements expressed or implied by the forward-looking information. Investors should refer to THMG's Form 10-K, Form 10-Q reports, for a more detailed discussion of risks that may impact future results. There can be no assurance that forward-looking information will prove to be accurate, as actual results and future events could differ materially from those anticipated in such statements. Accordingly, investors should not place undue reliance on forward-looking information. Forward-looking information is provided as of the date of this press release, and the Company assumes no obligation to update or revise them to reflect new events or circumstances, except as required in accordance with applicable laws.

Cautionary Note to Investors

For further information, please contact:

Thunder Mountain Gold, Inc.

Eric T. Jones
President and Chief Executive Officer
Eric@thundermountaingold.com
Office: (208) 658-1037

To view the source version of this press release, please visit https://www.newsfilecorp.com/release/279149

MFD Investment Holdings SA Enters the Options Review Phase for Near-Term Production with Ocean Partners at Thunder Mountain Gold`s South Mountain Mine

Mon, 08 Dec 2025 08:00:00 -0500

Scope includes initial toll-milling solutions and ore concentrate production; planning, metallurgical test work, and scoping-level commercial evaluation to commence - targeting potential commencement in 2026

Vancouver, British Columbia and Boise, Idaho--(Newsfile Corp. - December 8, 2025) - Thunder Mountain Gold, Inc. (TSXV: THM) (OTCQB: THMG) (the "Company" or "Thunder Mountain") announces that MFD Investment Holdings SA ("MFD") has entered the options review phase with Ocean Partners USA, Inc. ("Ocean Partners"), a trader specializing in base and precious metals ores and concentrates to evaluate near-term production pathways, including toll milling, direct shipping ore and concentrate production at the Company`s South Mountain Mine. This work will be undertaken under the small-scale mining initiative between Thunder Mountain Gold Inc. and MFD Investment Holdings SA ("MFD") and coordinated by MFD (see news release dated September 8, 2025). The program is targeting potential commencement of operations in 2026, subject to metallurgical outcomes, commercial terms, permitting, and internal approvals. No production decision has been made.

"Engaging Ocean Partners at this stage allows MFD and Thunder Mountain Gold to evaluate pathways for near-term production-from metallurgical compatibility to commercial terms," commented Eric T. Jones, President & CEO of Thunder Mountain Gold. "The objective in this options review phase is to assemble decision-quality data on toll milling and ore concentrate production so we can select the most executable and economic route forward."

Options Review Phase - Workstreams

Metallurgical test work: Sample selection and testing to evaluate recoveries across all metals, product specifications, and compatibility with toll processing.
Processing pathways: Reviewing toll-milling and direct shipping/sales options with Ocean Partners and qualified processors, including production throughput and campaign scheduling.
Production scenarios: Evaluation of concentrates versus direct ship, or toll milling and blending scenarios for the silver, zinc, gold and copper recovery.
Sequencing and Services: Assessment of production sequencing and possibilities for third-party services in execution of the preferred pathway.
Production approaches for targeted areas, required services, and operational sequencing.
Commercial/Economic Evaluation: Scoping-level cash-flow and sensitivity work incorporating processing, transport, and indicative commercial terms.
Logistics & Compliance: High-level review of haulage, permitting interfaces, and product marketing considerations.

Thunder Mountain Gold will provide further updates as the options review phase advances and key milestones are reached.

About Ocean Partners

Ocean Partners is an international metals company focused on the marketing and trading, of base- and precious-metal ores and concentrates and facilitates toll-processing solutions with third-party receivers. The company works with producers to structure commercial pathways for ore, concentrates and related products across the project life cycle.

Regarding Thunder Mountain Gold, Inc.

Thunder Mountain Gold Inc., a junior exploration company founded in 1935, owns interests in base and precious metals projects in the western U.S. The Company's principal asset is The South Mountain Mine, a historic former Anaconda Mining development of zinc, silver, gold, lead, and copper, located on private land in Owyhee County Idaho. Thunder Mountain Gold also owns 100% of the Trout Creek Project - a gold exploration project located along the western flank of the Shoshone Mountain Range in the Reese River Valley, adjacent to and surrounded by Nevada Gold Mines, a Barrick and Newmont Gold, Inc. joint venture. For more information on Thunder Mountain Gold, please visit the Company's website at www.Thundermountaingold.com.

The South Mountain Project

The South Mountain Mine is a polymetallic development project containing high-grade zinc, silver, gold, and copper, and is located on private land approximately 70 miles southwest of Boise, Idaho. The Project is on private land, permitting has been, and should remain straightforward. The Project was intermittently mined from the late from 1940s to the late 1960s, by Anaconda Copper, with over 4,000 feet of underground developmental workings that that have been rehabilitated, re-engineered, and are MSHA compliant. Thunder Mountain Gold Inc. purchased and advanced the project from 2007 through Present, with expenditures into the project of approximately US$25 million. Historic test mining and processing at the Project has mostly come from high-grade Carbonate Replacement Deposits (CRD) and skarn zones that remain open at depth and along strike. According to historical smelter records, approximately 53,642 tons of mineralized material have been mined and direct shipped to the smelter, with average grades; 14.5% Zn, 10.6 o.p.t. Ag (363.42 g/t Ag), 0.058 o.p.t. Au (1.98 g/t Au), 1.4% Cu, and 2.4% Pb were realized (See SK-1300 Technical Resource Statement, and NI 43-101 Technical Report: Updated Mineral Resource Estimate for the South Mountain Project, dated December 31, 2023, and December 15, 2023, respectively. More details are available on the Thunder Mountain Gold Inc. website and at www.SEC.gov, and www.sedarplus.ca).

Technical Data in this Release

Forward-Looking Statements

This press release contains forward-looking statements that are based on the beliefs of management and reflect the Company's current expectations. Generally, forward-looking statements can be identified by the use of forward-looking terminology such as "plans", "expects", "is expected", "budget", "scheduled", "estimates", "forecasts", "intends", "anticipates", "believes" or variations of such words and phrases or statements that certain actions, events or results "may", "could", "would", "might" or "will be taken", "occur" or "be achieved" or the negative connotation thereof. The forward-looking statements are based on certain assumptions, which could change materially in the future. By their nature, forward-looking information involves known and unknown risks, uncertainties and other factors that may cause actual results, performance or achievements to be materially different from any future results, performance or achievements expressed or implied by the forward-looking information. There can be no assurance that forward-looking information will prove to be accurate, as actual results and future events could differ materially from those anticipated in such statements. Accordingly, investors should not place undue reliance on forward-looking information. Forward-looking information is provided as of the date of this press release, and the Company assumes no obligation to update or revise them to reflect new events or circumstances, except as required in accordance with applicable laws.

Cautionary Note to Investors

Neither the TSX Venture Exchange nor its Regulation Services Provider (as that term is defined in policies of the TSX Venture Exchange) accepts responsibility for the adequacy or accuracy of this release.

For further information, please contact:

Thunder Mountain Gold, Inc.
Eric T. Jones
President and Chief Executive Officer
eric@thundermountaingold.com
Office: (208) 658-1037

To view the source version of this press release, please visit https://www.newsfilecorp.com/release/277214

Thunder Mountain Gold Closes US$2.5 Million Private Placement

Mon, 27 Oct 2025 09:55:00 -0400

Proceeds to Advance South Mountain and Corporate Growth Plans

Vancouver, British Columbia and Boise, Idaho--(Newsfile Corp. - October 27, 2025) - Thunder Mountain Gold, Inc. (TSXV: THM) (OTCQB: THMG) (the "Company" or "Thunder Mountain") announces it has closed its previously announced non-brokered private placement (the "Private Placement") for aggregate gross proceeds of US$2,500,000.

Investor highlights

Fully funded near-term work program: Proceeds are earmarked to advance South Mountain technical work (drilling, metallurgy, resource and mine planning studies) and for general working capital.
Simple, aligned structure: 10,000,000 units at US$0.25 per unit; each unit includes one common share and one-half common share purchase warrant. Each whole warrant is exercisable at US$0.40 until October 24, 2027.
Use of Proceeds: Funding supports a sequence of near-term technical and corporate milestones intended to advance the South Mountain Project, reduce project risk and advance step-out exploration.

CEO comment

Eric T. Jones, President & CEO, said, " This financing provides the capital needed to advance South Mountain. We appreciate the strong support from our investors, which underscores their confidence in our strategy, assets, management team, and long-term vision."

Financing details

Under the Private Placement, the Company issued 10,000,000 units (each, a "Unit") at a price of US$0.25 per Unit for gross proceeds of US$2,500,000. Each Unit consists of one common share of the Company (a "Common Share") and one-half of one common share purchase warrant (each whole warrant, a "Warrant"). Each Warrant entitles the holder to purchase one additional Common Share at a price of US$0.40 until October 24, 2027.

All securities issued pursuant to the Private Placement are subject to a statutory four-month hold period expiring February 24, 2026, in accordance with applicable Canadian securities laws and the policies of the TSX Venture Exchange.

The Private Placement was conducted pursuant to exemptions from prospectus and registration requirements of applicable securities laws and was made to accredited investors on a private placement basis. The securities offered have not been registered under the United States Securities Act of 1933, as amended (the "U.S. Securities Act"), or any state securities laws, and may not be offered or sold within the United States or to "U.S. persons" (as defined in Regulation S under the U.S. Securities Act) absent registration or an applicable exemption from such registration requirements.

Final acceptance of the Private Placement remains subject to the TSX Venture Exchange.

Regarding Thunder Mountain Gold, Inc.

Thunder Mountain Gold Inc., a junior exploration company founded in 1935, owns interests in base and precious metals projects in the western U.S. The Company's principal asset is The South Mountain Mine, a historic former Anaconda Mining development of zinc, silver, gold, lead, and copper, located on private land in Owyhee County Idaho. Thunder Mountain Gold also owns 100% of the Trout Creek Project - a gold exploration project located along the western flank of the Shoshone Mountain Range in the Reese River Valley, adjacent to and surrounded by Nevada Gold Mines, a Barrick and Newmont Gold, Inc. joint venture. For more information on Thunder Mountain Gold, please visit the Company's website at www.Thundermountaingold.com.

The South Mountain Project

The South Mountain Mine is a polymetallic development project containing high-grade zinc, silver, gold, and copper, and is located on private land approximately 70 miles southwest of Boise, Idaho (See Figure 1 above). The Project is on private land, permitting has been, and should remain straightforward. The Project was intermittently mined from the late from 1940s to the late 1960s, most notably by Anaconda Copper, with over 4,000 feet of underground developmental workings that that have been rehabilitated, re-engineered, and are MSHA compliant. Thunder Mountain Gold Inc. purchased and advanced the project from 2007 through Present, with expenditures into the project of approximately US$25 million. Historic test mining and processing at the Project has mostly come from high-grade Carbonate Replacement Deposits (CRD) and skarn zones that remain open at depth and along strike. According to historical smelter records, approximately 53,642 tons of mineralized material have been mined and direct shipped to the smelter, with average grades; 14.5% Zn, 10.6 o.p.t. Ag (363.42 g/t Ag), 0.058 o.p.t. Au (1.98 g/t Au), 1.4% Cu, and 2.4% Pb were realized (See SK-1300 Technical Resource Statement, and NI 43-101 Technical Report: Updated Mineral Resource Estimate for the South Mountain Project, dated December 31, 2023, and December 15, 2023, respectively. More details are available on the Thunder Mountain Gold Inc. website and at www.SEC.gov, and www.sedar.com).

Technical Data in this Release

The technical information in this news release was reviewed and approved by Tyson Forbush, C.P.G., consulting geologist with GeoTech LLC, and a "Qualified Person" as defined by the U.S. SK-1300 regulations & National Instrument 43-101 (Canada) standards.

Forward-Looking Statements

This press release contains forward-looking statements that are based on the beliefs of management and reflect the Company's current expectations. Generally, forward-looking statements can be identified by the use of forward-looking terminology such as "plans", "expects", "is expected", "budget", "scheduled", "estimates", "forecasts", "intends", "anticipates", "believes" or variations of such words and phrases or statements that certain actions, events or results "may", "could", "would", "might" or "will be taken", "occur" or "be achieved" or the negative connotation thereof. The forward-looking statements are based on certain assumptions, which could change materially in the future. By their nature, forward-looking information involves known and unknown risks, uncertainties and other factors that may cause actual results, performance or achievements to be materially different from any future results, performance or achievements expressed or implied by the forward-looking information. There can be no assurance that forward-looking information will prove to be accurate, as actual results and future events could differ materially from those anticipated in such statements. Accordingly, investors should not place undue reliance on forward-looking information. Forward-looking information is provided as of the date of this press release, and the Company assumes no obligation to update or revise them to reflect new events or circumstances, except as required in accordance with applicable laws.

Cautionary Note to Investors

For further information, please contact:

Thunder Mountain Gold, Inc.
Eric T. Jones
President and Chief Executive Officer
eric@thundermountaingold.com
Office: (208) 658-1037

To view the source version of this press release, please visit https://www.newsfilecorp.com/release/272034

Thunder Mountain Gold Inc. Announces Board Appointment

Fri, 03 Oct 2025 12:13:00 -0400

Vancouver, British Columbia and Boise, Idaho--(Newsfile Corp. - October 3, 2025) - Thunder Mountain Gold, Inc. (TSXV: THM) (OTCQB: THMG) (the "Company" or "Thunder Mountain") is pleased to announce the unanimous Board approval of the appointment of Mr. Ralph Noyes, current Board Member, as Chairman of the Board. This appointment will split the duties of the Chairmanship, from the President and Chief Executive Officers duties.

"We're excited to have Ralph serve in this leadership role," commented Eric T. Jones, President and CEO. "Ralph has served on the Thunder Mountain Gold Board since 2016, and has excellent board and executive level experience from his years as a mining company executive and consultant. He has proven exploration and development experience that will be instrumental as we advance our exploration and development plans."

Mr. Noyes is a seasoned international mining executive with over 45 years of experience. He has a wealth of experience in exploration, mine and project management, executive management, junior mining company boards, and investment portfolio management. Ralph spent a large part of his career as Manager of Mines and Vice President of Metal Mining with Hecla Mining Company, with direct corporate operations responsibility for Yellow Pine Mine – Stibnite Idaho (gold); Lucky Friday lead silver in Silver Valley, Idaho; Republic – Knob Hill Mine -gold silver in Washington state; The Escalante silver mine in Utah; and Hecla's interests in the Galena and Coeur Mine in the Silver Valley, Idaho, and the Greens Creek Mine in Alaska, along with the Rosebud Mine in Pershing County, Nevada. His group discovered and developed both the Golden Promise deposit in Republic and the Gold Hunter deposit near the Lucky Friday Mine in Idaho. Ralph also managed several massive sulfide, gold, beryllium, germanium and gallium projects across North America - from Mexico to Canada. Ralph most recently spent 15 years in investment portfolio management with Salomon Smith Barney, then Wells Fargo Advisors. He worked with individuals and small businesses, specializing in working with mining executives.

The appointment reflects Thunder Mountain Gold's continued commitment and vision to advancing the South Mountain resource to production and exploration of the South Mountain.

This news release shall not constitute an offer to sell or the solicitation of an offer to buy, nor shall there be any sale of these securities in any state or jurisdiction in which the offer, solicitation or sale would be unlawful.

Regarding Thunder Mountain Gold, Inc.

Thunder Mountain Gold Inc., a junior exploration company founded in 1935, owns interests in base and precious metals projects in the western U.S. The Company's principal asset is The South Mountain Mine, a historic former Anaconda Mining development of zinc, silver, gold, lead, and copper, located on private land in Owyhee County Idaho. Thunder Mountain Gold also owns 100% of the Trout Creek Project – a gold exploration project located along the western flank of the Shoshone Mountain Range in the Reese River Valley, adjacent to and surrounded by Nevada Gold Mines, a Barrick and Newmont Gold, Inc. joint venture. For more information on Thunder Mountain Gold, please visit the Company's website at www.Thundermountaingold.com.

The South Mountain Project

The South Mountain Mine is a polymetallic development project containing high-grade zinc, silver, gold, and copper, and is located on private land approximately 70 miles southwest of Boise, Idaho (See Figure 1 above). The Project is on private land, permitting has been, and should remain straightforward. The Project was intermittently mined from the late from 1940s to the late 1960s, most notably by Anaconda Copper, with over 4,000 feet of underground developmental workings that that have been rehabilitated, re-engineered, and are MSHA compliant. Thunder Mountain Gold Inc. purchased and advanced the project from 2007 through Present, with expenditures into the project of approximately US$25 million. Historic test mining and processing at the Project has mostly come from high-grade Carbonate Replacement Deposits (CRD) and skarn zones that remain open at depth and along strike. According to historical smelter records, approximately 53,642 tons of mineralized material have been mined and direct shipped to the smelter, with average grades; 14.5% Zn, 10.6 o.p.t. Ag (363.42 g/t Ag), 0.058 o.p.t. Au (1.98 g/t Au), 1.4% Cu, and 2.4% Pb were realized (See SK-1300 Technical Resource Statement, and NI 43-101 Technical Report: Updated Mineral Resource Estimate for the South Mountain Project, dated December 31, 2023, and December 15, 2023, respectively. More details are available on the Thunder Mountain Gold Inc. website and at www.SEC.gov, and www.sedarplus.ca).

Technical Data in this Release
The technical information in this news release was reviewed and approved by Tyson Forbush, C.P.G., consulting geologist with GeoTech LLC, and a "Qualified Person" as defined by the U.S. SK-1300 regulations & National Instrument 43-101 (Canada) standards.

Forward-Looking Statements

This press release contains forward-looking statements that are based on the beliefs of management and reflect the Company's current expectations. Generally, forward-looking statements can be identified by the use of forward-looking terminology such as "plans", "expects", "is expected", "budget", "scheduled", "estimates", "forecasts", "intends", "anticipates", "believes" or variations of such words and phrases or statements that certain actions, events or results "may", "could", "would", "might" or "will be taken", "occur" or "be achieved" or the negative connotation thereof. The forward-looking statements are based on certain assumptions, which could change materially in the future. By their nature, forward-looking information involves known and unknown risks, uncertainties and other factors that may cause actual results, performance or achievements to be materially different from any future results, performance or achievements expressed or implied by the forward-looking information. There can be no assurance that forward-looking information will prove to be accurate, as actual results and future events could differ materially from those anticipated in such statements. Accordingly, investors should not place undue reliance on forward-looking information. Forward-looking information is provided as of the date of this press release, and the Company assumes no obligation to update or revise them to reflect new events or circumstances, except as required in accordance with applicable laws.

Cautionary Note to Investors

For further information, please contact:

Thunder Mountain Gold, Inc.
Eric T. Jones
President and Chief Executive Officer
eric@thundermountaingold.com
Office: (208) 658-1037

To view the source version of this press release, please visit https://www.newsfilecorp.com/release/269043

Thunder Mountain Gold Clarifies Private Placement Financing

Fri, 03 Oct 2025 00:40:00 -0400

Vancouver, British Columbia and Boise, Idaho--(Newsfile Corp. - October 3, 2025) - Thunder Mountain Gold, Inc. (TSXV: THM) (OTCQB: THMG) (the "Company" or "Thunder Mountain") is issuing this news release in order to clarify that the private placement announced in its news release disseminated earlier today (the "Original News Release") is for an aggregate of up to 10,000,000 units of the Company (each, a "Unit") at a price of US$0.25 (CAD$0.35) per Unit for gross proceeds of up to US$2,500,000 (CAD$3,500,000) (the "Private Placement"). The Original News Release had incorrectly referred to an offering of up to 1,000,000 Units but had correctly stated the aggregate offering proceeds of up to US$2,500,000 (CAD$3,500,000).

Each Unit will consist of one share of the Company's common stock (each, a "Common Share") and one-half common share purchase warrant (each whole warrant, a "Warrant"). Each Warrant will entitle the holder to purchase one additional share of common stock of the Company at a price of US$0.40 (CAD$0.55) for a period of 24 months from the date of issuance. Subject to regulatory approval, the Company may close the Private Placement in one or more tranches.

The proceeds raised pursuant to the Private Placement will be used for exploration and for general working capital.

The Company has received the conditional approval of the TSX Venture Exchange to the completion of the Private Placement and closing remains subject to satisfaction to the conditions required by the TSX Venture Exchange.

The Private Placement will be made on a private placement basis to accredited investors only pursuant to exemptions from prospectus and registration requirements of applicable securities laws. The securities described herein have not been, and will not be, registered under the United States Securities Act of 1933, as amended (the "U.S. Securities Act"), or any state securities laws, and accordingly, may not be offered or sold within the United States or to "U.S. persons", as such term is defined in Regulation S promulgated under the U.S. Securities Act, except in compliance with the registration requirements of the U.S. Securities Act and applicable state securities laws, or pursuant to exemptions therefrom. The securities issued in the Private Placement will be "restricted securities" under the U.S. Securities Act. The securities issued in the Private Placement will be subject to a four-month hold period in accordance with the policies of the TSX Venture Exchange and applicable Canadian securities legislation.

Regarding Thunder Mountain Gold, Inc.

Thunder Mountain Gold Inc., a junior exploration company founded in 1935, owns interests in base and precious metals projects in the western U.S. The Company's principal asset is The South Mountain Mine, a historic former Anaconda Mining development of zinc, silver, gold, lead, and copper, located on private land in Owyhee County Idaho. Thunder Mountain Gold also owns 100% of the Trout Creek Project - a gold exploration project located along the western flank of the Shoshone Mountain Range in the Reese River Valley, adjacent to and surrounded by Nevada Gold Mines, a Barrick and Newmont Gold, Inc. joint venture. For more information on Thunder Mountain Gold, please visit the Company's website at www.Thundermountaingold.com.

The South Mountain Project

The South Mountain Mine is a polymetallic development project containing high-grade zinc, silver, gold, and copper, and is located on private land approximately 70 miles southwest of Boise, Idaho (See Figure 1 above). The Project is on private land, permitting has been, and should remain straightforward. The Project was intermittently mined from the late from 1940s to the late 1960s, most notably by Anaconda Copper, with over 4,000 feet of underground developmental workings that that have been rehabilitated, re-engineered, and are MSHA compliant. Thunder Mountain Gold Inc. purchased and advanced the project from 2007 through Present, with expenditures into the project of approximately US$25 million. Historic test mining and processing at the Project has mostly come from high-grade Carbonate Replacement Deposits (CRD) and skarn zones that remain open at depth and along strike. According to historical smelter records, approximately 53,642 tons of mineralized material have been mined and direct shipped to the smelter, with average grades; 14.5% Zn, 10.6 o.p.t. Ag (363.42 g/t Ag), 0.058 o.p.t. Au (1.98 g/t Au), 1.4% Cu, and 2.4% Pb were realized (See SK-1300 Technical Resource Statement, and NI 43-101 Technical Report: Updated Mineral Resource Estimate for the South Mountain Project, dated December 31, 2023, and December 15, 2023, respectively. More details are available on the Thunder Mountain Gold Inc. website and at www.SEC.gov, and www.sedarplus.ca).

Forward-Looking Statements

This press release contains forward-looking statements that are based on the beliefs of management and reflect the Company's current expectations. Generally, forward-looking statements can be identified by the use of forward-looking terminology such as "plans", "expects", "is expected", "budget", "scheduled", "estimates", "forecasts", "intends", "anticipates", "believes" or variations of such words and phrases or statements that certain actions, events or results "may", "could", "would", "might" or "will be taken", "occur" or "be achieved" or the negative connotation thereof. The forward-looking statements are based on certain assumptions, which could change materially in the future. By their nature, forward-looking information involves known and unknown risks, uncertainties and other factors that may cause actual results, performance or achievements to be materially different from any future results, performance or achievements expressed or implied by the forward-looking information. There can be no assurance that forward-looking information will prove to be accurate, as actual results and future events could differ materially from those anticipated in such statements. Accordingly, investors should not place undue reliance on forward-looking information. Forward-looking information is provided as of the date of this press release, and the Company assumes no obligation to update or revise them to reflect new events or circumstances, except as required in accordance with applicable laws.

Cautionary Note to Investors

For further information, please contact:

Thunder Mountain Gold, Inc.
Eric T. Jones
President and Chief Executive Officer
eric@thundermountaingold.com
Office: (208) 658-1037

To view the source version of this press release, please visit https://www.newsfilecorp.com/release/269004

Thunder Mountain Gold Announces Private Placement Financing

Thu, 02 Oct 2025 10:08:00 -0400

Vancouver, British Columbia and Boise, Idaho--(Newsfile Corp. - October 2, 2025) - Thunder Mountain Gold, Inc. (TSXV: THM) (OTCQB: THMG) (the "Company" or "Thunder Mountain") is pleased to announce that its board of directors has approved a non-brokered private placement of up to 1,000,000 units of the Company (each, a "Unit") at a price of US$0.25 (CAD$0.35) per Unit for gross proceeds of up to US$2,500,000 (CAD$3,500,000) (the "Private Placement"). Each Unit will consist of one share of the Company's common stock (each, a "Common Share") and one-half common share purchase warrant (each whole warrant, a "Warrant"). Each Warrant will entitle the holder to purchase one additional share of common stock of the Company at a price of US$0.40 (CAD$0.55) for a period of 24 months from the date of issuance. Subject to regulatory approval, the Company may close the Private Placement in one or more tranches.

The proceeds raised pursuant to the Private Placement will be used for exploration and for general working capital.

The Company has received conditional approval of the TSX Venture Exchange to the completion of the Private Placement and closing remains subject to satisfaction to the conditions required by the TSX Venture Exchange.

Regarding Thunder Mountain Gold, Inc.

Thunder Mountain Gold Inc., a junior exploration company founded in 1935, owns interests in base and precious metals projects in the western U.S. The Company's principal asset is The South Mountain Mine, a historic former Anaconda Mining development of zinc, silver, gold, lead, and copper, located on private land in Owyhee County Idaho. Thunder Mountain Gold also owns 100% of the Trout Creek Project - a gold exploration project located along the western flank of the Shoshone Mountain Range in the Reese River Valley, adjacent to and surrounded by Nevada Gold Mines, a Barrick and Newmont Gold, Inc. joint venture. For more information on Thunder Mountain Gold, please visit the Company's website at www.Thundermountaingold.com.

The South Mountain Project

The South Mountain Mine is a polymetallic development project containing high-grade zinc, silver, gold, and copper, and is located on private land approximately 70 miles southwest of Boise, Idaho (See Figure 1 above). The Project is on private land, permitting has been, and should remain straightforward. The Project was intermittently mined from the late from 1940s to the late 1960s, most notably by Anaconda Copper, with over 4,000 feet of underground developmental workings that that have been rehabilitated, re-engineered, and are MSHA compliant. Thunder Mountain Gold Inc. purchased and advanced the project from 2007 through Present, with expenditures into the project of approximately US$25 million. Historic test mining and processing at the Project has mostly come from high-grade Carbonate Replacement Deposits (CRD) and skarn zones that remain open at depth and along strike. According to historical smelter records, approximately 53,642 tons of mineralized material have been mined and direct shipped to the smelter, with average grades; 14.5% Zn, 10.6 o.p.t. Ag (363.42 g/t Ag), 0.058 o.p.t. Au (1.98 g/t Au), 1.4% Cu, and 2.4% Pb were realized (See SK-1300 Technical Resource Statement, and NI 43-101 Technical Report: Updated Mineral Resource Estimate for the South Mountain Project, dated December 31, 2023, and December 15, 2023, respectively. More details are available on the Thunder Mountain Gold Inc. website and at www.SEC.gov, and www.sedar.com).

Technical Data in this Release

Forward-Looking Statements

This press release contains forward-looking statements that are based on the beliefs of management and reflect the Company's current expectations. Generally, forward-looking statements can be identified by the use of forward-looking terminology such as "plans", "expects", "is expected", "budget", "scheduled", "estimates", "forecasts", "intends", "anticipates", "believes" or variations of such words and phrases or statements that certain actions, events or results "may", "could", "would", "might" or "will be taken", "occur" or "be achieved" or the negative connotation thereof. The forward-looking statements are based on certain assumptions, which could change materially in the future. By their nature, forward-looking information involves known and unknown risks, uncertainties and other factors that may cause actual results, performance or achievements to be materially different from any future results, performance or achievements expressed or implied by the forward-looking information. There can be no assurance that forward-looking information will prove to be accurate, as actual results and future events could differ materially from those anticipated in such statements. Accordingly, investors should not place undue reliance on forward-looking information. Forward-looking information is provided as of the date of this press release, and the Company assumes no obligation to update or revise them to reflect new events or circumstances, except as required in accordance with applicable laws.

Cautionary Note to Investors

For further information, please contact:

Thunder Mountain Gold, Inc.

Eric T. Jones
President and Chief Executive Officer
eric@thundermountaingold.com
Office: (208) 658-1037

To view the source version of this press release, please visit https://www.newsfilecorp.com/release/268877

Thunder Mountain Gold and MFD Establish Small-Scale Production Agreement at South Mountain

Mon, 08 Sep 2025 08:00:00 -0400

THMG to operate while MFD Investment Holdings SA to fund 100% in a non-dilutive Venture

Boise, Idaho and Zug, Switzerland--(Newsfile Corp. - September 8, 2025) - Thunder Mountain Gold, Inc. (OTCQB: THMG) (TSXV: THM) ("Thunder Mountain Gold" or the "Company") and MFD Investment Holdings SA ("MFD") have executed a small-scale production agreement (the "Agreement") for the South Mountain Project in Owyhee County, Idaho (the "Project"). Under the small-scale production Agreement, Thunder Mountain Gold will serve as operator (the "Operator"), and MFD will fund 100% of the qualifying capital required to advance to small-scale production. Following commencement of production, project revenues from small-scale production will be allocated 80% to MFD and 20% to THMG until MFD has recovered 1.5× its qualifying capital investment; thereafter revenues will be shared 50/50 until 1.5 million tonnes are mined; then all revenues and production are 100% allocated to Thunder Mountain Gold. Implementation remains subject to permitting, definitive budgets, and customary approvals. The Agreement will be implemented under the option agreement between the Company and MFD dated January 14, 2025 (as amended, the "Option Agreement"), as amended by agreement dated September 4, 2025 (the "Amendment"). Under the Option Agreement, the Company will grant to MFD the option to acquire a 10% interest in the South Mountain Project by MFD incurring an aggregate of $1.0 million in exploration expenditures on the Project by October 31, 2026 (the "Option"). Investors are referred to the Form 8-K filed concurrently for a detailed summary of the material provisions of the Option Agreement.

"Advancing selective small-scale production without issuing equity keeps our balance sheet intact, creates positive cash flow, and positions the Company to pursue resource growth. We believe this combination of non-dilutive funding, operator control, and continued exploration focus-best supports shareholder value over time," commented Eric T. Jones, President & CEO.

Strategic Rationale for Thunder Mountain Gold

Non-dilutive pathway to potential cash flow: MFD carries the qualifying capital through initial small-scale production; no change to THMG share capital is contemplated by the Agreement.
Operator control retained by THMG: Planning and execution remain with the Company as Operator.
Parallel value creation: The framework allows THMG to focus on exploration and potential resource expansion while small-scale production may generate non-dilutive cash flow.
No impact on full-scale project economics: The revenue waterfall applies only to small-scale production and does not alter the economics of the existing Option Agreement or any future full-scale development.

Principal Terms - Small-Scale Production Right

Operator: Thunder Mountain Gold (THMG).
Funding: MFD funds 100% of qualifying capital to achieve small-scale production.
Term/Cap: Right ends at the earlier of 10 years or 1.5 million tonnes of cumulative economic ore.
Revenue Allocation: 80% MFD / 20% THMG until 1.5× MFD payback on qualifying capital; 50/50 thereafter until the Term/Cap is achieved.
Scope: Applies only to small-scale production revenues; no change to Option Agreement economics.

Option Agreement - Unchanged, with Date Extension

Earn-in: MFD may earn 10% equity in South Mountain Mines, Inc. (SMMI) by investing US$1,000,000.
Schedule: Earn-in deadline extended to October 31, 2026.
Credit of Project Expenditures: Mutually approved Expenditures under the Agreement will be credited toward the US$1,000,000 threshold.
All other Option Agreement provisions remain in full force and effect.

Disclosure Logistics and Future Clarifications

THMG's NI 43-101 requirements and MFD's non-issuer disclosures are expected to be addressed with the definitive final JV agreement. Items such as precise small-scale production area limits, definitions of "material" budget changes, and governance structures (e.g., a technical committee) may likewise be finalized at that time. The Agreement is intentionally streamlined at this stage.

The South Mountain Project

The South Mountain Mine is a polymetallic development project containing high-grade zinc, silver, gold, and copper, and is located on private land approximately 70 miles southwest of Boise, Idaho (See Figure 1 above). The Project is on private land, permitting has been, and should remain straightforward. The Project was intermittently mined from the late from 1940s to the late 1960s, most notably by Anaconda Copper, with over 4,000 feet of underground developmental workings that that have been rehabilitated, re-engineered, and are MSHA compliant. Thunder Mountain Gold Inc. purchased and advanced the project from 2007 through Present, with expenditures into the project of approximately US$25 million. Historic test mining and processing at the Project has mostly come from high-grade Carbonate Replacement Deposits (CRD) and skarn zones that remain open at depth and along strike. According to historical smelter records, approximately 53,642 tons of mineralized material have been mined and direct shipped to the smelter, with average grades; 14.5% Zn, 10.6 o.p.t. Ag (363.42 g/t Ag), 0.058 o.p.t. Au (1.98 g/t Au), 1.4% Cu, and 2.4% Pb were realized (See SK-1300 Technical Resource Statement, and NI 43-101 Technical Report: Updated Mineral Resource Estimate for the South Mountain Project, dated December 31, 2023, and December 15, 2023, respectively. More details are available on the Thunder Mountain Gold Inc. website and at www.SEC.gov, and www.sedarplus.ca).

Technical Data in this Release

Regarding Thunder Mountain Gold, Inc.

Thunder Mountain Gold Inc., a junior exploration company founded in 1935, owns interests in base and precious metals projects in the western U.S. The Company's principal asset is The South Mountain Mine, a historic former Anaconda Copper Company development of zinc, silver, gold, lead, and copper, located on private and public lands in Owyhee County Idaho. Thunder Mountain Gold also owns 100% of the Trout Creek Project - a gold exploration project located along the western flank of the Shoshone Mountain Range in the Reese River Valley, adjacent to and surrounded by Nevada Gold Mines, a Barrick and Newmont Gold, Inc. joint venture. For more information on Thunder Mountain Gold, please visit the Company's website at www.Thundermountaingold.com.

Forward-Looking Statements

This press release contains forward-looking statements that are based on the beliefs of management and reflect the Company's current expectations. Generally, forward-looking statements can be identified by the use of forward-looking terminology such as "plans", "expects", "is expected", "budget", "scheduled", "estimates", "forecasts", "intends", "anticipates", "believes" or variations of such words and phrases or statements that certain actions, events or results "may", "could", "would", "might" or "will be taken", "occur" or "be achieved" or the negative connotation thereof. The forward-looking statements are based on certain assumptions which could change materially in the future. By their nature, forward-looking information involves known and unknown risks, uncertainties and other factors that may cause actual results, performance or achievements to be materially different from any future results, performance or achievements expressed or implied by the forward-looking information. Investors should refer to THMG's Form 10-K, and Form 10-Q reports, for a more detailed discussion of risks that may impact future results. There can be no assurance that forward-looking information will prove to be accurate, as actual results and future events could differ materially from those anticipated in such statements. Accordingly, investors should not place undue reliance on forward-looking information. Forward-looking information is provided as of the date of this press release, and the Company assumes no obligation to update or revise them to reflect new events or circumstances, except as required in accordance with applicable laws.

Cautionary Note to Investors

This news release is intended for release in the United States only. Neither the TSX Venture Exchange, the OTCQB, nor its Regulation Services Provider (as that term is defined in policies of the TSX Venture Exchange) accepts responsibility for the adequacy or accuracy of this release.

For further information, please contact:

Thunder Mountain Gold, Inc.
Eric T. Jones
President and Chief Executive Officer
Eric@thundermountaingold.com
Office: (208) 658-1037

To view the source version of this press release, please visit https://www.newsfilecorp.com/release/265462