Trinity One Metals Announces Director Appointment

Vancouver, December 10, 2025 - Trinity One Metals Ltd. (TSXV: TOM) ("Trinity One" or the "Company") is pleased to announce the appointment of Mr. Scott Eldridge to the Company's Board of Directors.

Mr. Eldridge brings 17 years of experience in the metals and mining industry focused on capital markets, having served in various buy-side, sell-side and issuer roles. Mr. Eldridge was a co-founder of Euroscandic International Group, an advisory firm where he raised upwards of $350M of combined equity and non-equity for the mining industry. Mr. Eldridge also served as CFO of Amarillo Gold prior to its takeover by Hochschild Mining. Mr. Eldridge is currently a director of Nevada Lithium Resources, a company developing one of the largest lithium deposits in North America. Mr. Eldridge is currently an independent director of United Lithium Corp. He is also a founder of Patriot Critical Minerals, a company that owns the United State's largest tungsten deposit. He currently serves as a Director and CEO of Military Metals, a company focused on antimony with a portfolio spanning the US, Canada and Slovakia, being the EU's largest antimony deposit. Mr. Eldridge holds a Bachelor of Business Administration degree and a Masters of Business Administration.

Trinity One's CEO, Thomas Wood, commented, "Scott's deep experience in capital markets and his demonstrated track record of financing and advancing mining projects around the world make him an exceptional addition to our Board. His breadth of knowledge across precious and critical minerals, project development, and strategic growth will be invaluable as we continue to advance Trinity One's exploration portfolio. We are very pleased to welcome Scott to the team."

About Trinity One Metals Ltd.

Trinity One Metals Ltd. is a junior mineral exploration company focused on discovering and advancing high-quality resource opportunities in Mongolia and Australia. With a disciplined, science-driven approach, the Company targets underexplored terranes with strong geological potential for precious and critical metals. Our strategy prioritizes early-stage value creation through efficient exploration programs, responsible field practices, and strong engagement with local communities.

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 news release.

Cautionary Statement Regarding "Forward-Looking" Information

This news release includes "forward-looking statements" and "forward-looking information" within the meaning of Canadian securities legislation. All statements included in this news release, other than statements of historical fact, are forward-looking statements. Forward-looking statements include predictions, projections and forecasts and are often, but not always, identified by the use of words such as "anticipate", "believe", "plan", "estimate", "expect", "potential", "target", "budget" and "intend" and statements that an event or result "may", "will", "should", "could" or "might" occur or be achieved and other similar expressions and includes the negatives thereof.

Forward-looking statements are based on the reasonable assumptions, estimates, analysis, and opinions of the management of the Company made in light of its experience and its perception of trends, current conditions and expected developments, as well as other factors that management of the Company believes to be relevant and reasonable in the circumstances at the date that such statements are made. Forward-looking information is based on reasonable assumptions that have been made by the Company as at the date of such information and is subject to known and unknown risks, uncertainties and other factors that may have caused actual results, level of activity, performance or achievements of the Company to be materially different from those expressed or implied by such forward-looking information, including but not limited to: risks associated with mineral exploration and development; metal and mineral prices; availability of capital; accuracy of the Company's projections and estimates; realization of mineral resource estimates, interest and exchange rates; competition; stock price fluctuations; availability of drilling equipment and access; actual results of current exploration activities; government regulation; political or economic developments; environmental risks; insurance risks; capital expenditures; operating or technical difficulties in connection with development activities; personnel relations; and changes in Project parameters as plans continue to be refined. Forward-looking statements are based on assumptions management believes to be reasonable, including but not limited to the price of silver, gold and Ba; the demand for precious and critical metals; the ability to carry on exploration and development activities; the timely receipt of any required approvals; the ability to obtain qualified personnel, equipment and services in a timely and cost-efficient manner; the ability to operate in a safe, efficient and effective matter; and the regulatory framework regarding environmental matters, and such other assumptions and factors as set out herein. Although the Company has attempted to identify important factors that could cause actual results to differ materially from those contained in forward-looking information, there may be other factors that cause results not to be as anticipated, estimated or intended. There can be no assurance that forward-looking statements will prove to be accurate and actual results, and future events could differ materially from those anticipated in such statements. Accordingly, readers should not place undue reliance on forward looking information contained herein, except in accordance with applicable securities laws. The forward-looking information contained herein is presented for the purpose of assisting investors in understanding the Company's expected financial and operational performance and the Company's plans and objectives and may not be appropriate for other purposes. The Company does not undertake to update any forward-looking information, except in accordance with applicable securities laws.

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