TriMetals Mining Inc. Appoints New CFO

VANCOUVER, British Columbia, Oct.20, 2017(GLOBE NEWSWIRE) -- TriMetals Mining Inc. (TSX:TMI) (OTCQX:TMIAF), (the "Company"), is pleased to announce the appointment of Ms. Rebecca Moriarty as Chief Financial Officer of the Company, effective immediately.

Ms. Moriarty is a Senior Consultant at Malaspina Consultants Inc. in Vancouver and she focuses on clients in the resource sector where, as a former mineralogist, she brings a unique combination of field knowledge and business accounting expertise. Ms. Moriarty advises clients on matters related to financial management and public company reporting, and is particularly adept at handling complex issues and multiple stakeholders with a collaborative, team-based approach. She is currently the CFO of a number of mineral exploration companies.

Prior to joining Malaspina, Ms. Moriarty was a manager at PricewaterhouseCoopers LLP working exclusively with resource companies. She holds a B.Sc (Geology) from Queens University and received her Chartered Accountant designation in 2002.

Ms. Moriarty appointment comes with the resignation of Mr. Matias Herrero who has accepted a position in another company. Mr. Herrero has been the Company's CFO since 2012.Ralph Fitch, President and CEO, said "We thank Matias for all his contributions over the years and for his professionalism. We wish him the very best in his future endeavors.We are delighted that Rebecca has accepted the role as CFO and look forward to having her as part of the leadership team."

About TriMetals Mining Inc.

TriMetals Mining Inc. is a growth focused mineral exploration company creating value through the exploration and development of the near surface, Gold Springs gold-silver project in mining friendly Nevada and Utah in the U.S.A. and by demonstrating the value of the Escalones copper-gold porphyry project, near El Teniente in Chile.

The Company's approach to business combines the team's track record of discovery and advancement of large projects, key operational and process expertise, and a focus on community relations and sustainable development. Management has extensive experience in the global exploration and mining industry.

The Company's common shares and Class B shares are listed on the Toronto Stock Exchange under the symbols "TMI" and "TMI.B" and the common shares and Class B shares also trade on the OTCQX market under the symbol "TMIAF" and "TMIBF".Note that the Class B shares have no interest in the properties or assets of the Company. The Class B shares are only entitled collectively to 85% of the net cash, if any, (after deducting all costs, taxes and expenses and the third-party funder's portion thereof) received by TMI from award or settlement in relation to the Company's subsidiary South American Silver Limited's arbitration proceeding against Bolivia for the expropriation of the Malku Khota project in 2012.Additional information related to TriMetals Mining Inc. is available at www.trimetalsmining.com and on SEDAR at www.sedar.com.

Forward-looking Statements

Certain statements contained herein constitute "forward-looking statements". Forward-looking statements look into the future and provide an opinion as to the effect of certain events and trends on the business. Forward-looking statements may include words such as "seek", "continue", "creating", "expects" and similar expressions. These forward- looking statements are based on current expectations and entail various risks and uncertainties. Actualresultsmaymateriallydifferfromexpectations,ifknownandunknownrisksor uncertainties affect our business, or if our estimates or assumptions prove inaccurate. Factors that could cause results or events to differ materially from current expectations expressed or implied by the forward-looking statements, include, but are not limited to, the outcome of the international arbitration process, including the timing and the quantum of damages to be obtained, management's expectation with regard to the final amount of costs, fees and other expenses and commitments payable in connection with the arbitration, and any inability or delay in the collection of the value of any award or settlement; and risks of the mineral exploration industry which may affect the advancement of the Gold Springs or Escalones projects, including possible variations in mineral resources or grade, recovery rates, metal prices, availability of sufficient financing to fund further required work in a timely manner and on acceptable terms, availability of equipment and qualified personnel, failure of equipment or processes to operate as anticipated, changes in project parameters as plans continue to be refined; and other risks more fully described in the Company's Annual Information Form filed and publicly available on SEDAR at www.sedar.com. The assumptions made in developing the forward-looking statements include: the ability of the Company to realize value from its investments in Bolivia; the arbitration proceeding in a customary manner and in accordance with Procedural Order No. 1 (as amended in April and June 2015 and in January 2016) and the third party funder honoring its contractual commitments, the accuracy of current resource estimates and the interpretation of drill, metallurgical testing and other exploration results; the continuing support for mining by local governments in Nevada, Utah and Chile, the availability of equipment and qualified personnel to advance the Gold Springs project; and the execution of the Company's existing plans and further exploration and development programs for the Gold Springs Project, which may change due to changes in the views of the Company or if new information arises which makes it prudent to change such plans or programs.

Readers are cautioned not to place undue reliance on the forward-looking statements contained in this news release. Except as required by law, the Company assumes no obligation to update or revise any forward-looking statement, whether as a result of new information, future events or any other reason. Unless otherwise indicated, forward-looking statements in this news release describe the Company's expectations as of October 12, 2017.

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