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First Mining Signs Process Agreement with CAT Lake First Nation and LAC Seul First Nation Supporting Anishinaabe-Led Impact Assessment

Permits & Approvals

T SX: FF

OTCQX: FFMGF

FRANKFURT: FMG

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NEWS RELEASE

FIRST MINING SIGNS PROCESS AGREEMENT WITH CAT LAKE FIRST NATION AND

LAC SEUL FIRST NATION SUPPORTING ANISHINAABE-LED IMPACT ASSESSMENT

October 31, 2024 – Sioux Lookout, Canada – First Mining Gold Corp. (“First Mining” or the “Company”)

(TSX: FF) (OTCQX: FFMGF) (FRANKFURT: FMG) is pleased to announce that it has entered into a Process

Agreement with Cat Lake First Nation (“ Cat Lake”) and Lac Seul First Nation (“ Lac Seul”) which provides

important capacity support for the implementation of a community -based Anishinaabe -Led Impact

Assessment (“ALIA”).

The Process Agreement represents a significant commitment for First Mining and provides the framework

for First Mining, Cat Lake and Lac Seul to have procedural clarity and meaningful participation in the

review of the Springpole Gold Project (“Springpole Project” or the “Project”) through the unique cultural

perspective of the Anishinaabe people.

“We are very pleased to support this leading-edge work on community-based Indigenous engagement for

the Springpole Project with Cat Lake and Lac Seul” stated Dan Wilton, CEO of First Mining. “First Mining is

privileged to be working in the traditional territories of the Nations and we understand and appreciate

the significant commitment of time and resources that Cat Lake and Lac Seul are contributing and we look

forward to working with the Nations and leadership to continue to advance meaningful dialogue.

Springpole has the potential to deliver significant infrastructure and economic benefits to an

underserviced area of Northwestern Ontario and we believe that the Project, properly delivered with

respect and protection for the land, air and water, can have a lasting positive impact for generations to

come”.

First Mining continues to meet and work with Indigenous communities and community leaders around

the Springpole Project to support awareness, address questions and comments, and invite participation

towards Project improvement and planning.

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,

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.

TSX: FF

OTCQX: FFMGF

FRANKFURT: FMG

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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 event s. 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 t hose 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, 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, pandemics or other health crises, 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 commo dities; 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 developments; risks and hazards associated w ith 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 o n

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, 202 3 filed with the Canadian securities regulatory authorities

under the Company’s SEDAR+ profile at www.sedarplus.ca.

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.