Mr. Daniel Wilton reports

FIRST MINING ADDS SECOND DRILL RIG AT THE DUPARQUET GOLD PROJECT AND PROVIDES CORPORATE UPDATE

First Mining Gold Corp. has provided an update on its continuing 2025 exploration activities at the Duparquet gold project located in the prolific Abitibi gold region of Quebec, Canada. The company has added a second drill rig during the month of April, 2025, to further advance progress on its previously announced approximately 18,000-metre exploration drilling program. The 2025 drill campaign is designed for and aligned to the company's exploration strategy, which aims to further delineate and expand known mineralization, enhance resource confidence, and drill test priority regional targets.

To date, the company has completed 10 holes for 3,100 metres targeting a number of prospective growth areas planned for advancement in 2025. The Duparquet project covers a 5,800-hectare consolidated land package, strategically located along a 19-kilometre strike length of the prolific Destor-Porcupine fault zone within the Abitibi greenstone belt -- one of the world's most significant gold-producing regions.

Assay results from the continuing 2025 drill program are not yet available, and the company intends to disclose results on a forward-looking basis as they are received, subject to thorough review and quality assurance/quality control approval.

Investor relations update

The company has engaged GRA Enterprises LLC to provide investor relations and marketing services pursuant to a consulting agreement dated April 25, 2025, for a period of six months. GRA received a total fee of $50,000 (U.S.) in consideration for services to be provided through the term of the engagement. GRA is an arm's-length party to the company and may purchase securities in the company from time to time for investment purposes.

About the Duparquet gold project

The Duparquet project is geologically situated in the southern part of the Abitibi greenstone belt and is geographically located approximately 50 kilometres north of the city of Rouyn-Noranda. The project benefits from easy access and proximity to an existing work force and infrastructure, including road, rail and hydroelectric grid power. The Duparquet project currently hosts a National Instrument 43-101-compliant gold resource of 3.44 million ounces in the measured and indicated category, grading 1.55 grams per tonne gold, and an additional 2.64 million ounces in the inferred category, grading 1.62 g/t Au. First Mining completed a preliminary economic assessment on the project in 2023 (see news releases dated Sept. 7, 2023, and Oct. 23, 2023).

The Duparquet project totals approximately 5,800 hectares focused on an area of 19 kilometres of strike length along the prolific Destor-Porcupine fault zone, along with numerous mineralized splays and influential secondary lineaments. The Duparquet project includes the past-producing Beattie, Donchester and Duquesne mines, as well as the Central Duparquet, Dumico and Pitt gold deposits.

Qualified person

James Maxwell, PGeo, vice-president, exploration and project operations, for First Mining, is a qualified person for the purposes of NI 43-101 (Standards of Disclosure for Mineral Projects), and has reviewed and approved the scientific and technical disclosure contained in this news release.

About First Mining Gold Corp.

First Mining is a gold developer advancing two of the largest gold projects in Canada: the Springpole gold project in Northwestern Ontario, where it has commenced a feasibility study and where permitting activities are continuing with a final environmental impact statement/environmental assessment for the project submitted in November, 2024; and the Duparquet gold project in Quebec, a preliminary-economic-assessment-stage development project located on the Destor-Porcupine fault zone in the prolific Abitibi region. First Mining also owns the Cameron gold project in Ontario and a portfolio of gold project interests, including the Pickle Crow gold project (being advanced in partnership with Firefly Metals Ltd.) and the Hope Brook gold project (being advanced in partnership with Big Ridge Gold Corp.).

First Mining was established in 2015 by Keith Neumeyer, founding president and chief executive officer of First Majestic Silver Corp.

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