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First Mining Announces the Submission of its Final Environmental Impact Statement / Environmental Assessment for the Springpole Gold Project

Permits & Approvals

TSX: FF

OTCQX: FFMGF

FRANKFURT: FMG

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NEWS RELEASE

First Mining Announces the Submission of its Final Environmental

Impact Statement / Environmental Assessment for the Springpole Gold Project

November 5, 2024 – Vancouver, BC, Canada – First Mining Gold Corp. (“First Mining” or the “Company”)

(TSX: FF) (OTCQX: FFMGF) (FRANKFURT: FMG) is pleased to announce the submission of the Final

Environmental Impact Statement / Environmental Assessment (“Final EIS/EA”) for the Springpole Gold

Project (the “Project”) in northwestern Ontario.

The Final EIS/EA submission marks a major procedural milestone in the advancement of the Project . It

results from two and a half years of consultation and engagement since submitting the draft EIS/EA in

May 2022. The Final EIS/EA incorporates over 14 years of research and data collection and includes several

optimizations completed since the Pre- Feasibility Study that improve the Project’s environmental and

operational performance. The work assesses more than 20 environmental and socio -economic factors,

a detailed analysis of the Project design, as well as proposed environmental mitigation measures and

major benefits throughout the Project’s lifecycle. The Project is being assessed by the Impact Assessment

Agency of Canada (“IAAC”) in accordance with the Canadian Environmental Assessment Act (CEAA, 2012)

and by the Ministry of Environment Conservation and Parks ( “MECP”) under Ontario’s Environmental

Assessment Act.

“This is a major milestone for the Springpole Project,” stated Dan Wilton, CEO of First Mining. “The team

has worked across multiple scientific and engineering disciplines to achieve a sustainable Project that will

both protect the environment and deliver tremendous socio-economic and infrastructure benefits to an

underserviced region of Northwestern Ontario. Through advancements in Project designs, analysis shows

that all regulatory requirements will be met by the Project, including fish habitat offsettin g and water

quality that will meet stringent Canadian Water Quality Guidelines during all phases of the Project. The

input received from all parties during the draft EIS/EA review helped inform the optimizations made for

the Final EIS/EA and the Company is appreciative of the contributors to that process. Through the creation

of over 43,000 person-years of employment, over $2 billion in government revenue, and with the training,

employment and business opportunities for local and Indigenous communities , Springpole is positioned

to be the new economic engine for Northwestern Ontario”.

First Mining is committed to on-going engagement with Indigenous communities to support local capacity

needs and consultation processes to achieve mutual information sharing and understanding for the long

term. The next step in the EI S/EA process involves a conformity review by the IAAC to confirm that the

Final EIS/EA meets the EIS guidelines and a public comment period for the provincial and federal processes

that is expected to close in Q1 2025. The complete EIS/EA process is anticipated to conclude in Q4 2025.

For more information, please visit: https://www.firstmininggold.com/springpole-ea

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 final Environmental Impact Statement / Environmental Assessment for the project

submitted in November 2024 , and the Duparquet Gold Project in Quebec, a PEA -stage development

TSX: FF

OTCQX: FFMGF

FRANKFURT: FMG

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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 wi th 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 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

TSX: FF

OTCQX: FFMGF

FRANKFURT: FMG

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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.