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First Mining Establishes At-The-Market Facility

Financings

TSX: FF

OTCQX: FFMGF

FRANKFURT: FMG

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NEWS RELEASE

First Mining Establishes At-The-Market Facility

August 20, 2019 – Vancouver, BC – First Mining Gold Corp. (“First Mining” or the “Company”) (TSX: FF)

(OTCQX: FFMGF) (FRANKFURT: FMG) is pleased to announce the establishment of an at-the-market equity

program (the “ATM Program”) pursuant to which First Mining, at its discretion and from time to time, may

issue up to $15 million of common shares (“Common Shares”) to the public at the prevailing market price

of the Common Shares when issued through the Toronto Stock Exchange (the “TSX”). The volume and

timing of distributions under the ATM Program, if any, will be determined at First Mining’s sole discretion,

subject to applicable regulatory limitations under Canadian securities laws.

Sales of Common Shares through the ATM Program will be made pursuant to the terms of an equity

distribution agreement dated August 19, 2019 (the “Equity Distribution Agreement”) between First

Mining and Cantor Fitzgerald Canada Corporation (“Cantor”). The net proceeds from the ATM Program, if

any, will be used by the Company for development and permitting activities at its Canadian gold projects,

as well as for general working capital purposes. The ATM Program will be effective until the earlier of July

26, 2021 or completion of the sale of the maximum number of shares thereunder unless terminated prior

to such date in accordance with the Equity Distribution Agreement.

Sales of Common Shares, if any, under the ATM Program are anticipated to be made in transactions that

are deemed to be “at-the-market distributions” as defined in National Instrument 44 -102 Shelf

Distributions, including sales made directly on the TSX or on any other existing trading market for the

Common Shares in Canada. The Common Shares will be distributed at the prevailing market prices at the

time of the sale and, as a result, prices may vary among purchasers a nd during the period of

distribution. The Company has applied for conditional approval from the TSX for the listing of the Common

Shares to be offered under the ATM Program.

The ATM Program is being established pursuant to a prospectus supplement dated August 19, 2019 (the

“Prospectus Supplement”) to the Company's Canadian short form base shelf prospectus dated June 24,

2019 (the “Shelf Prospectus”), filed with the securities regulatory authorities in each of th e provinces of

Canada and a supplement to the base prospectus included in the Company’s U.S. registration statement

on Form F-10 (the “Registration Statement”) filed with the United States Securities and Exchange

Commission. The Canadian prospectus supplem ent (together with the related base shelf prospectus) is

available on the SEDAR website maintained by the Canadian Securities Administrators at www.sedar.com

and the U.S. prospectus supplement (together with the related base prospectus) is available on the SEC's

website (www.sec.gov). Alternatively, copies of the Prospectus Supplement will be available upon request

by contacting Cantor Fitzgerald Canada Corporation, attention: Equity Capital Markets, 181 University

Avenue, Suite 1500, Toronto, ON, M5H 3M7, email [email protected].

This news release does not constitute an offer to sell or the solicitation of an o ffer to buy the Common

Shares, nor shall there be any sale of these securities in any jurisdiction in which such an offer, solicitation

or sale would be unlawful prior to registration or qualification under the securities laws of any such

jurisdiction.

TSX: FF

OTCQX: FFMGF

FRANKFURT: FMG

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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. Th e Company currently holds a portfolio of 24

mineral assets in Canada, Mexico and the United States, and may acquire additional mineral assets in the

future.

ON BEHALF OF FIRST MINING GOLD CORP.

Daniel W. Wilton

Chief Executive Officer and Director

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 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 news release. Forward -looking statements are frequently, but not always, ide ntified 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 anticipated sale and distribution of Common Shares under the ATM Program; (ii) the aggregate

value of Common Shares which may be issued pursuant to the ATM Program; (iii) the volume and timing of the sale

and distribution of Common Shares under the ATM Program; (iv) the Company’s expected use of the net proceeds of

the ATM Program, if any ; ( v) the anticipated benefits an d impacts of the ATM Program ; and ( vi) realizing and

unlocking 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 assump tions 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 ar e 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

TSX: FF

OTCQX: FFMGF

FRANKFURT: FMG

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factors. Such factors include, without limitation: 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); market price and volume of trading in the Company’s shares; 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 and exploration drilling programs, development and mining (including

environmental hazards, industrial acciden ts, 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 s takeholders; 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 th e year ended

December 31, 2018 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.

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.

Cautionary Note to United States Investors

This news release has been prepared in accordance with the requirements of the securities 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 t his news release have been prepared in accordance with National 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, includi ng 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. standards,

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

could be economically and legally produce d 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 e ver 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 cau tioned 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 per mits 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 th e SEC, and reserves

reported by the Company in compliance with NI 43 -101 may not qualify as "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.