Thunder Gold Acquires 100% of Thunder Lake Property, Shebandowan Greenstone Belt, Ontario

About this update from Thunder Gold Corp.

Thunder Bay, Ontario--(Newsfile Corp. - June 16, 2026) - Thunder Gold Corp. (TSXV: TGOL) (FSE: Z25) (OTCQB: TGOLF) (" Thunder Gold " or the " Company ") is pleased to announce it has executed a Definitive Agreement (the " Agreement ") with Clifford Hickman (the " Optionor "), to acquire a 100% interest in the Thunder Lake Property (the " Property "), consisting of 29 mineral claims, totalling 625 hectares. The Property is immediately west and contiguous with the Company's flagship Tower Mountain Property located 40 kilometres west of the port city of Thunder Bay, Ontario. The Company can earn a 100% interest in the Property by issuing 250,000 common shares of Thunder Gold to the Optionor, subject to a 4-month hold period. The Optionor retains a 2% net smelter royalty ("NSR") on all mineral and/or gas production from the Property, half of which may be purchased, at any time, by the Company for C$1,000,000. The Company also retains the right to match any bona-fide offer the Optionor may receive on the remaining 1% NSR. The terms outlined are subject to approval by the TSX Venture Exchange. Figure 1 - Thunder Lake Property - Shebandowan Greenstone Belt, Ontario, Canada To view an enhanced version of this graphic, please visit: https://images.newsfilecorp.com/files/5364/301543_80bd252244066860_001full.jpg Wes Hanson P.Geo., President and CEO states: " Acquiring the Thunder Lake Property increases the footprint of the Tower Mountain Property to over 7,625 hectares, providing additional future working space that may be invaluable as we continue to advance and de-risk Tower Mountain. Large scale resource opportunities require vast working space and the Thunder Lake Property offers space in addition to prospectivity for nickel, copper and gold based on historical assessment reports." Tower Mountain Property Highlights Table 1. Tower Mountain Mineral Resource Estimate - January 19, 2026   Notes: Qualified Person Technical information in this news release has been reviewed and approved by Wes Hanson, P.Geo., President and CEO of Thunder Gold Corp., who is a Qualified Person under the definitions established by NI 43-101. About the Tower Mountain Gold Property The 100%-owned Tower Mountain Gold Property is located adjacent to the Trans-Canada highway, approximately 40-km west of Thunder Bay, Ontario. The 7,625-hectare property surrounds the largest, exposed, intrusive complex in the eastern Shebandowan Greenstone Belt where most known gold occurrences have been described as occurring either within, or proximal to, intrusive rocks. Gold at Tower Mountain is localized within extremely altered rocks parallel to the western contact of the intrusive center. Diamond drilling has established an initial Indicated Resource of 500,000 ounces of gold with an Inferred Resource of 3.0 million ounces of gold parallel to the western contact of the intrusive center. Gold mineralization starts at surface and persists to vertical depths of 500 metres. Approximately 75% of the perimeter surrounding the intrusion offers identical geology, alteration, and geophysical signatures, representing a compelling exploration opportunity. A second exploration target, parallel to the Thunder Lake Fault, extends from the northern limit of the current mineral resource pit shell, 5,000 metres to the southwest. Drilling in 2026 identified widespread gold mineralization at surface, within a broad, 100-metre plus sequence of Timiskaming type conglomerates overlying the fault. Gold grades are identical to those reported along the western contact at Tower Mountain. About Thunder Gold Corp. Thunder Gold is advancing the Tower Mountain Project in Thunder Bay, Ontario - an emerging gold system with the scale, consistency, and quality to support a long-life, open-pit operation. Results from our disciplined drill programs have consistently reinforced confidence in the continuity and predictability of the discovery, while highlighting significant potential for expansion across multiple zones of the Tower Mountain Intrusive Complex. With industry-leading drilling costs, existing infrastructure and a skilled local workforce, Tower Mountain represents a rare combination of size, scalability, and cost-effective growth. At Thunder Gold, our vision is clear: to unlock a discovery that has the potential to become a transformational gold project, delivering long-term value for shareholders while contributing to the future of Canada's mining industry. For more information about the Company please visit: www.thundergoldcorp.com On behalf of the Board of Directors, Wes Hanson, P.Geo., President and CEO For further information contact: Wes Hanson, CEO (647) 202-7686 [email protected] Bryan Baritot, Investor Relations [email protected] NEITHER THE TSX VENTURE EXCHANGE NOR ITS REGULATION SERVICES PROVIDER (AS THAT TERM IS DEFINED IN THE POLICIES OF THE TSX VENTURE EXCHANGE) ACCEPTS RESPONSIBILITY FOR THE ADEQUACY OR ACCURACY OF THIS RELEASE. The information contained herein contains "forward-looking information" and "forward-looking statements" within the meaning of applicable securities legislation (collectively, "forward-looking statements"). Forward-looking statements relate to information that is based on assumptions of management, forecasts of future results, and estimates of amounts not yet determinable. All statements, other than statements of historical fact, are forward-looking statements and are based on predictions, expectations, beliefs, plans, projections, objectives and assumptions made as of the date of this news release, including without limitation; anticipated results of geophysical drilling programs, geological interpretations and potential mineral recovery. Any statement that involves discussions with respect to predictions, expectations, beliefs, plans, projections, objectives, assumptions, future events or performance (often but not always using phrases such as "expects", or "does not expect", "is expected", "anticipates" or "does not anticipate", "plans", "budget", "scheduled", "forecasts", "estimates", "believes" or "intends" or variations of such words and phrases or stating that certain actions, events or results "may" or "could", "would", "might" or "will" be taken to occur or be achieved) are not statements of historical fact and may be forward-looking statements. Forward-looking statements are subject to a variety of risks and uncertainties which could cause actual events or results to differ from those reflected in the forward-looking statements, including, without limitation: risks related to failure to obtain adequate financing on a timely basis and on acceptable terms; risks related to the outcome of legal proceedings; political and regulatory risks associated with mining and exploration; risks related to the maintenance of stock exchange listings; risks related to environmental regulation and liability; the potential for delays in exploration or development activities or the completion of feasibility studies; the uncertainty of profitability; risks and uncertainties relating to the interpretation of drill results, the geology, grade and continuity of mineral deposits; risks related to the inherent uncertainty of production and cost estimates and the potential for unexpected costs and expenses; results of prefeasibility and feasibility studies, and the possibility that future exploration, development or mining results will not be consistent with the Company's expectations; risks related to the gold price and other commodity price fluctuations; and other risks and uncertainties related to the Company's prospects, properties and business detailed elsewhere in the Company's disclosure record. Should one or more of these risks and uncertainties materialize, or should underlying assumptions prove incorrect, actual results may vary materially from those described in forward-looking statements. Investors are cautioned against attributing undue certainty or reliance on forward-looking statements. These forward-looking statements are made as of the date hereof and the Company does not assume any obligation to update or revise any forward-looking statements, other than as required by applicable law, to reflect new information, events or circumstances, or changes in management's estimates, projections or opinions. Actual events or results could differ materially from those anticipated in the forward-looking statements or from the Company's expectations or projections. To view the source version of this press release, please visit https://www.newsfilecorp.com/release/301543

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