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FF.TO ·

First Mining Announces $2.0 Million Flow-Through Equity Financing

Financings

TSX: FF

OTCQX: FFMGF

FRANKFURT: FMG

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NEWS RELEASE

NOT FOR DISTRIBUTION TO UNITED STATES NEWS WIRE SERVICES

OR FOR DISSEMINATION IN THE UNITED STATES

First Mining Announces $2.0 Million Flow-Through Equity Financing

December 4, 2019 – Vancouver, BC – First Mining Gold Corp. (“First Mining” or the “Company”) (TSX:

FF) (OTCQX: FFMGF) (FRANKFURT: FMG) is pleased to announce that it intends to complete a flow-through

equity financing by way of a non -brokered private placement for aggregate proceeds of approximately

$2.0 million (the “Offering”). The Offering will consist of 7,405,000 common shares of the Company (the

“Flow-Through Shares”) that qualify as flow-through shares for purposes of the Income Tax Act (Canada),

at a price of $0.27 per Flow-Through Share.

The gross proceeds raised from the sale of the Offering will be used by First Mining to fund exploration

programs that qualify as “Canadian Exploration Expenses” (“CEE”) and “flow -through mining

expenditures”, as those terms are defined in the Income Tax Act (Canada).

A 5.0% finder’s fee will be payable on the aggregate gross proceeds of the Offering, and First Mining will

pay such fee in common shares of the Company (the “Finder’s Fee Shares”).

The closing of the Offering is expected to occur on or before December 20, 2019 (the “Closing Date”) and

is subject to the completion of formal documentation and receipt of all applicable regulatory approvals,

including the approval of the Toronto Stock Exchange. The Flow- Through Shares to be issued under the

Offering and the Finder’s Fee Shares will be subject to a statutory hold period of four months and one day

from the Closing Date.

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

in the United States. The securities have not been and will not be registered under the United States Act of

1933, as amended (the “U.S. Securiti es Act”) or any state securities laws and may not be offered or sold

within the United States or to U.S. Persons (as such term is defined in Regulation S under the U.S. Securities

Act) unless registered under the U.S. Securities Act and applicable state se curities laws or an exemption

from such registration is available.

About First Mining Gold Corp.

First Mining Gold Corp. is an emerging development company with a diversified portfolio of gold projects

in North America. Having assembled a large resource base of 7.4 million ounces of gold in the Measured

and Indicated categories and 3.8 million ounces of gold in the Inferred category in mining friendly

jurisdictions of eastern Canada, First Mining is now focused on advancing its material assets towards a

construction decision and, ultimately, to production. The Company currently holds a portfolio of 24

mineral assets in Canada, Mexico and the United States.

ON BEHALF OF FIRST MINING GOLD CORP.

Daniel W. Wilton

Chief Executive Officer and Director

TSX: FF

OTCQX: FFMGF

FRANKFURT: FMG

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For further information, please contact:

Mal Karwowska | Vice President, Corporate Development & Investor Relations

Direct: 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 Uni ted 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 news release. Forward -looking statements are frequently, but not always, identi fied by

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

"potential”, "possible”, “strategy”, “goals”, “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 and include, but are not limited to, statements

with respect to: (i) the completion of the Offering and the timing thereof; (ii) the use of the gross proceeds from the

sale of the Flow-Through Shares issued under the Offering to fund exploration programs that qualify as CEE and flow-

through mining expenditures; (iii) the Company’s focus on advancing its assets towards production; and (iv) 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, 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: failure to obtain regulatory approval; demand for the Units and FT Units;

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 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, 2018 filed with the Canadian securities

regulatory authorities under the Company’s SED AR profile at www.sedar.com, 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 stat ement, whether written or oral, that may be made from time to time by the

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

TSX: FF

OTCQX: FFMGF

FRANKFURT: FMG

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Cautionary Note to United States Investors

This news release has been prepared in accordance with the requirements of the securit ies laws in effect in Canada,

which differ from the requirements of U.S. securities laws. Unless otherwise indicated, all resource and reserve

estimates included in this news release have been prepared in accordance with N ational Instrument 43 -101

Standards of Disclosure for Mineral Projects (“NI 43 -101”) and the Canadian Institute of Mining, Metallurgy, and

Petroleum 2014 Definition Standards on Mineral Resources and Mineral Reserves. NI 43 -101 is a rule developed by

the Canadian Securities Administrators which establishes standards for all public disclosure an issuer makes of

scientific and technical information concerning mineral projects. Canadian standards, including NI 43 -101, differ

significantly from the requirements of the SEC, and mineral resource and reserve information contained herein may

not be comparable to similar information disclosed by U.S. companies. In particular, and without limiting the

generality of the foregoing, the term "resource” does not equate to the term "reserves”. Under U.S. s tandards,

mineralization may not be classified as a "reserve” unless the determination has been made that the mineralization

could be economically and legally produced or extracted at the time the reserve determination is made. The SEC's

disclosure standards normally do not permit the inclusion of information concerning "measured mineral resources”,

"indicated mineral resources” or "inferred mineral resources” or other descriptions of the amount of mineralization

in mineral deposits that do not constitute "reserves” by U.S. standards in documents filed with the SEC. Investors are

cautioned not to assume that any part or all of mineral deposits in these categories will ever be converted into

reserves. U.S. investors should also understand that "inferred mineral resources” have a great amount of uncertainty

as to their existence and great uncertainty as to their economic and legal feasibility. It cannot be assumed that all or

any part of an "inferred mineral resource” will ever be upgraded to a higher category. Under Canadian rules,

estimated "inferred mineral resources” may not form the basis of feasibility or pre- feasibility studies except in rare

cases. Investors are cautioned not to assume that all or any part of an "inferred mineral resource” exists or is

economically or legally mineable. Disclosure of "contained ounces” in a resource is permitted disclosure under

Canadian regulations; however, the SEC normally only permits issuers to report mineralization that does not

constitute "reserves” by SEC standards as in -place tonnage and grade without reference to unit measures. The

requirements of NI 43 -101 for identification of "reserves” are also not the same as those of the SEC, and reserves

reported by the Company in compliance with NI 43 -101 may not qualify a s "reserves” under SEC standards.

Accordingly, information concerning mineral deposits set forth herein may not be comparable with information made

public by companies that report in accordance with U.S. standards.