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First Mining Announces Approval of Springpole Environmental Assessment Terms of Reference from the Ontario Ministry of the Environment, Conservation and Parks

Permits & Approvals

TSX: FF

OTCQX: FFMGF

FRANKFURT: FMG

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NEWS RELEASE

First Mining Announces Approval of Springpole Environmental Assessment

Terms of Reference from the Ontario Ministry of the Environment,

Conservation and Parks

November 9, 2021 – Vancouver, BC – First Mining Gold Corp. (“First Mining” or the “Company”) (TSX:

FF) (OTCQX: FFMGF) (FRANKFURT: FMG) is pleased to announce it has received a Notice of Approval from

the Ontario Ministry of the Environment, Conservation and Parks on the Environmental Assessment Terms

of Reference (“ToR”) for its Springpole Gold Project (“Project”) located in Ontario. First Mining has worked

closely with our local and Indigenous communities and government agencies to develop the final ToR that

considers their feedback. This Notice of Approval marks the formal commencement of the Ontario

Environmental Assessment (“EA”) process and allows First Mining to advance the regulatory process

which will assess the benefits and potential environmental effects and associated mitigation measures for

the Project.

“This is an important milestone for the Springpole Gold Project as we formally enter the provincial EA

process,” stated Dan Wilton, CEO of First Mining. “First Mining is grateful for the hard work put in by our

Indigenous communities and their advisors throughout the ToR process and recognize the significant role

they will play in the advancement of the Project. We are eager to continue the dialogue with our

communities to discuss how we can strengthen our partnership and bring sustainable economic

development to the region.”

The ToR provides a framework for the preparation of the provincial EA documents in accordance with the

Ontario Environmental Assessment Act. The ToR describes the purpose of the Project, alternative designs

for the Project and how they will be evaluated, the potential effects of the P roject to be considered and

assessment methodology, as well as how Indigenous communities, government agencies and all other

public stakeholders will be engaged and consulted throughout the process.

In addition, with the approval of the ToR, First Mining can now more effectively advance the provincial EA

in a coordinated manner with the federal EA process pursuant to the Canadian Environmental Assessment

Act, 2012 based on the federal Environment Impact Statement (“EIS”) guidelines issued to First Mining in

2018.

About First Mining Gold Corp.

First Mining is a Canadian gold developer focused on the develo pment and permitting of the Springpole

Gold Project in north-western Ontario. Springpole is one of the largest undeveloped gold projects in

Canada. The results of a positive Pre-Feasibility Study for the Springpole Gold Project were announced by

First Mining in January 2021, and permitting activities are on-going with submission of an Environmental

Impact Statement (“EIS”) for the project targeted for 2021. The Company also holds a large equity position

in Treasury Metals Inc. who are advancing the Goliath Gold Complex toward construction. First Mining’s

portfolio of gold projects in eastern Canada also includes the Pickle Crow (being advanced in partnership

with Auteco Minerals Ltd.), Hope Brook (being advanced in partnership with Big Ridge Gold Corp.),

Cameron, Duparquet, Duquesne, and Pitt gold projects.

TSX: FF

OTCQX: FFMGF

FRANKFURT: FMG

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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:

Richard Huang | Vice President, Corporate Development

Direct: +1 604 639 8824 | Toll Free: 1 844 306 8827 | Email: [email protected]

www.firstmininggold.com

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 Secur ities Litigation Reform Act of 1995. These forward -looking statements are

made as of the date of this news 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”, “targeted”, “advancing”, “proving” 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 and include, but are not limited to, statements

with respect to: (i) the Company’s focus on advancing its assets towards production; (ii) timing for the submission of

the EIS for the Springpole Gold Project; and (iii) realizing the value of the Company’s gold projects for the Company’s

shareholders. 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. Many factors, both known and unknown, could cause actual results,

performance or achievements to be materially different from the results, perfor mance or achievements that are or

may be expressed or implied by such forward- looking statements and the parties have made assumptions and

estimates based on or related to many of these factors. Such factors include, without limitation: the potential offering

of any S ecurities by the Company ; uncertainty with respect to the completion of any future offering; the ability to

obtain applicable regulatory approval for any contemplated offerings ; the ability of the Company to negotiate and

complete future funding transactions; 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 developments;

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

environmental hazards, industrial accidents, unusual or unexpected for mations, 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, 2020 filed with the Canadian securities regulatory authorities under the Company’s SEDAR profile at

www.sedar.com, and in the Company’s Annual Report on Form 40-F filed with the SEC on EDGAR.

TSX: FF

OTCQX: FFMGF

FRANKFURT: FMG

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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.