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First Mining Files Final Base Shelf Prospectus and Registration Statement

Financings

TSX: FF

OTCQX: FFMGF

FRANKFURT: FMG

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1398-4814-0041.2

NEWS RELEASE

First Mining Files Final Base Shelf Prospectus and

Registration Statement

January 24, 2024 – Vancouver, BC – First Mining Gold Corp. (“First Mining” or the “Company”) (TSX: FF)

(OTCQX: FFMGF) (FRANKFURT: FMG) announces that it has obtained a receipt for as final short form base

shelf prospectus (the “Final Shelf Prospectus”) filed with the securities regulatory authorities in each of

the provinces of Canada, and its corresponding registration statement on Form F -10 (the “Registration

Statement”) has been filed with the United States Securities and Exchange Commission (the “ SEC”) and

become effective under the U.S./Canada Multijurisdictional Disclosure System.

First Mining has filed the Final Shelf Prospectus and the Registration Statement to provide the Company

with greater financial flexibility going forward, but has not entered into any agreements or arrangements

to authorize or offer any Securities (as defined below) at this time.

The Final Shelf Prospectus and the Registration Statement will allow First Mining to undertake offerings

of common shares (including common shares issued on a “flow -through” basis), preferred shares,

warrants, subscription receipts and units (collectively, the “Securities”), or any combination thereof, up

to an aggregate total of C$100 million from time to time during the 25-month period that the Final Shelf

Prospectus remains effective. The Securities may be offered in amounts, at prices and on terms to be

determined at the time of sale and, subject to applicable regulations, may include “at-the-market”

transactions, public offerings or strategic investments. The specific terms of any offering of Securities, if

any, including the use of proceeds from such offering, will be set forth in a shelf prospectus supplement

pertaining to such offering to be filed with applicable securities regulatory authorities.

Copies of the Final Shelf Prospectus and the Registration Statement can be found, respectively, under the

Company’s SEDAR+ profile at www.sedarplus.ca and on EDGAR at www.sec.gov, or may be obtained by

request to Richard Huang, Vice President, Corporate Development , Suite 2070 – 1188 West Georgia

Street, Vancouver, British Columbia V6E 4A2, Canada (tel: 1 -844-306-8827), or to

[email protected].

No securities regulatory authority has either approved or disapproved the contents of this news release.

This news release does not constitute an offer to sell or a solicitation of an offer to buy any securities of

the Company in any jurisdiction in which such offer, solicitation or sale would be unlawful.

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), the Hope Brook Gold Project (being advanced in partnership with Big Ridge Gold

Corp.), and a large equity interest in Treasury Metals Inc.

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:

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 Pri vate Securities 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 filing and effectiveness of any potential prospectus supplement; (ii) the Company undertaking

any offering of Securities under the Final Shelf Prospectus and corresponding Registration Statement, including the

amount and terms of any Securities to be offered; (iii) the Company’s plans with respect to advancing its portfolio of

gold projects; (iv) feasibility and permitting activities related to the Springpole Gold Project; and (v) realizing the value

of the Company’s gold projects f or 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 informatio n 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, performance 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 Securities 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

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 increas ing 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, 2022 filed with the Canadian securities regulatory authorities

TSX: FF

OTCQX: FFMGF

FRANKFURT: FMG

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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 and 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.