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First Mining Closes Upsized $8.5 Million Private Placement 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 Closes Upsized $8.5 Million Private Placement Financing

March 6, 2020 – Vancouver, BC – First Mining Gold Corp. (“First Mining” or the “Company”) (TSX: FF)

(OTCQX: FFMGF) (FRANKFURT: FMG) is pleased to announce that it has closed its previously announced

non-brokered private placement financing (the “Offering”), raising total gross proceeds of $8.5 million

across three tranches of the Offering.

Dan Wilton, CEO of First Mining, stated “We are delighted to have strong participation from our existing

shareholders in this financing. Their support , along with additional investment by management and

insiders, has allowed us to upsize this financing and continue to move Springpole through the permitting

and Pre-Feasibility Study process.”

Pursuant to the third and final tranche of the Offering , the Company issued 4,091,500 units of the

Company (the “Units”) at a price of $ 0.22 per Unit for gross proceeds of $ 900,130. Each Unit consists of

one common share of the Company (a “Unit Share”) and one-half of one common share purchase warrant

(each whole common share purchase warrant, a “Warrant”). Each Warrant will enti tle the holder to

acquire one common share of the Company at a price of $0.33 at any time prior to March 6, 2023. The

Company raised $2.5 million under the first tranche of the Offering, and $5.1 million under the second

tranche of the Offering (see news releases dated February 14, 2020 and February 28, 2020).

The net proceeds raised from the sale of the Units under the Offering 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 Unit Shares issued in the third tranche of the Offering are subject to a statutory hold period of f our

months and one day from closing, expiring on July 7, 2020.

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. Securities Act”) or any state securities laws and may not be offe red 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 securities laws or an exemption

from such registration is available.

About First Mining Gold Corp.

First Mining Gold Corp. is a Canadian -focused gold exploration and development company advancing 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. First Mining’s primary focus is the development and permitting

of its Springpole Gold Project and the advanced exploration of its Goldlund Gold Project, both located in

northwestern Ontario. Springpole is one of the largest undeveloped gold assets in Canada, with permitting

and a Pre -Feasibility Study underway. Goldlund is an advanced exploration stage asset where drilling is

ongoing to define both the extension of the existing resource area and to better define the regional scale

TSX: FF

OTCQX: FFMGF

FRANKFURT: FMG

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potential. First Mining’s eastern Canadian property portfolio also includes Cameron, Pickle Crow, Hope

Brook, Duparquet, Duquesne, and Pitt.

First Mining was created 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:

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 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”, “objectives”, or variations thereof or stating that certain actions, events

or results "may", "could", "would", "might" or "will" be taken, occur or be achi eved, 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 use of the net proceeds from the sale of the Unit Shares issued under the Offering for

development and permitting activities at the Company’s Canadian gold projects, and for general working capital

purposes; (ii) the Company’s focus on advancing its as sets towards production; and (i ii) 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 respectiv e 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 envir onmental hazards, industrial accidents, unusual or

unexpected formations, pressures, cave- ins and flooding); the presence of laws and regulations that may impose

TSX: FF

OTCQX: FFMGF

FRANKFURT: FMG

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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 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 this news release have been prepared in accordance with 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” do es 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 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 res ource” 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 par t 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 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. st andards.