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First Mining Publishes Third Annual ESG Report

Corporate Updates

TSX: FF

OTCQX: FFMGF

FRANKFURT: FMG

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NEWS RELEASE

First Mining Publishes Third Annual ESG Report

June 27, 2024 – Vancouver, Canada – First Mining Gold Corp. (“First Mining” or the “Company”) (TSX:

FF) (OTCQX: FFMGF) (FRANKFURT: FMG) i s pleased to announce the publication of its third annual

Environmental, Social and Governance (“ESG”) Report for the 2023 year (“ESG Report”). The ESG Report

is part of the Company’s ongoing and annual commitment to communicate our past achievements and

share information on efforts made and to be made, showcasing our dedication to sustainable practices,

ethical conduct and transparent governance, highlighting t he strategic importance of these efforts in

shaping First Mining’s ongoing development. The ESG Report has been drafted with consideration of the

Sustainability Accounting Standards Board (“SASB”) reporting standards.

2023 Sustainability Highlights:

• Safety Performance: 0 total recordable injury cases and 174 hours of health and safety training

provided.

• Diversity & Inclusion: 43% full -time employees are female and 19% full- time employees self -

identify as Indigenous.

• Environment: Completion of the local Caribou and Wolverine habitat assessment programs.

• Community Investment : Over $4.7 million in goods and services spent locally, including

Indigenous owned businesses. $1.3 million in capacity support to Indigenous communities.

“First Mining is excited to publish our third annual ESG report as we continue to work collaboratively at

our two flagship assets,” stated Dan Wilton, CEO of First Mining. “At our Springpole Gold Project, we have

been working to provide meaningful opportunities for engagement with communities and regulators over

the past year as we prepare to submit our final environmental assessment document in 2024. At our

Duparquet Gold Project, we have continued to collect and update targeted environmental baseline data

and are working with the Municipality of Duparquet and its residents on project planning initiatives. At

First Mining, the principles of ESG are deeply embedded in how we operate every day. One of our core

values is ‘we embrace challenges and continuously strive for optimal solutions ’ and is a cornerstone of

our business philosophy as well as our approach to ESG. We welcome your feedback and look forward to

continuing our story as we take both our Springpole and Duparquet projects and First Mining into the

future.”

First Mining’s 2023 ESG Report is available at: https://firstmininggold.com/esg/esg-report/

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 we have commenced a Feasibility Study and permitting activities

are on-going with a draft Environmental Impact Statement (“EIS”) for the project published in June 2022,

TSX: FF

OTCQX: FFMGF

FRANKFURT: FMG

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and the Duparquet Project in Quebec, a PEA-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 Mr. Keith Neumeyer, founding President and CEO of First Majestic

Silver Corp.

ON BEHALF OF FIRST MINING GOLD CORP.

Daniel W. Wilton

Chief Executive Officer and Director

For further information, please contact:

Toll Free: 1 844 306 8827 | Email: [email protected]

Paul Morris | Director, Investor Relations | Email: [email protected]

Cautionary Note Regarding Forward-Looking Statements

This news release includes certain “ forward-looking information” and “ forward-looking statements” (collectively

“forward-looking statements”) within the meaning of applicable Canadian and United States securities legislation

including the United States Private Securities Litigation Reform Act of 1995. These forward- looking statements are

made as of the date of this n ews release. Forward -looking statements are frequently, but not always, identified by

words such as “ expects”, “anticipates”, “believes”, “plans”, “projects”, “ intends”, “estimates”, “envisages”,

“potential”, “possible”, “strategy”, “goals”, “opportunities”, “objectives”, or variations thereof or stating that certain

actions, events or results “may”, “could”, “would”, “might” or “will” be taken, occur or be achieved, or the negative

of any of these terms and similar expressions.

Forward-looking statements in this news release relate to future events or future performance and reflect current

estimates, predictions, expectations or beliefs regarding future events. All forward-looking statements are based on

First Mining's or its consultants' current beliefs as well as various assumptions made by them and information

currently available to them. There can be no assurance that such statements will prove to be accurate, and actual

results and future events could differ materially from those anticipated in such statements. Forward- looking

statements reflect the beliefs, opinions and projections on the date the statements are made and are based upon a

number of assumptions and estimates that, while considered reasonable by the respective parties, are inherently

subject to significant business, economic, competitive, political and social uncertainties and contingencies. Such

factors include, without limitation the Company’s business, operations and financial condition potentially being

materially adversely affected by the outbreak of epidemics, pandemics or other health crises, such as COVID-19, and

by reactions by government and private actors to such outbreaks; risks to employee health and safety as a result of

the outbreak of epidemics, p andemics or other health crises, such as COVID -19, that may result in a slowdown or

temporary suspension of operations at some or all of the Company's mineral properties as well as its head

office; fluctuations in the spot and forward price of gold, silver , base metals or certain other commodities;

fluctuations in the currency markets (such as the Canadian dollar versus the U.S. dollar); changes in national and

local government, legislation, taxation, controls, regulations and political or economic developm ents; risks and

hazards associated with the business of mineral exploration, development and mining (including environmental

hazards, industrial accidents, unusual or unexpected formations, pressures, cave- ins and flooding); the presence of

laws and regulations that may impose restrictions on mining; employee relations; relationships with and claims by

local communities, indigenous populations and other stakeholders; availability and increasing costs associated with

mining inputs and labour; the speculative nature of mineral exploration and development; title to properties.; and

the additional risks described in the Company’s Annual Information Form for the year ended December 31, 2023 filed

TSX: FF

OTCQX: FFMGF

FRANKFURT: FMG

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with the Canadian securities regulatory authorities under the Company’s SEDAR + profile at www.sedarplus.ca, and

in the Company’s Annual Report on Form 40-F filed with the SEC on EDGAR.

First Mining cautions that the foregoing list of factors that may affect future results is not exhaustive. When relying

on our forward -looking statements to make decisions with respect to First Mining, investors and others should

carefully consider the foregoing factors and other uncertainties and potential events. First Mining does not undertake

to update any forward- looking statement, whether written or oral, that may be made from time to time by the

Company or on our behalf, except as required by law.