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Thunder Mountain Gold Closes US$2.5 Million Private Placement Proceeds to Advance South Mountain and Corporate Growth Plans

Financings

Thunder Mountain Gold Closes US$2.5 Million Private Placement

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 oƯered 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 oƯered 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 diƯerent 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 diƯer

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 OƯicer

[email protected]

OƯice: (208) 658-1037

SOURCE: Thunder Mountain Gold, Inc. - USD