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First Mining Closes Upsized $7.4 Million Non-Brokered 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 $7.4 Million

Non-Brokered Private Placement Financing

May 16, 2019 – Vancouver, BC – First Mining Gold Corp. (“First Mining” or the “Company”) (TSX: FF)

(OTCQX: FFMGF) (FRANKFURT: FMG) is pleased to anno unce that due to strong demand, the Company

has upsized and closed its previously announced non -brokered private placement offering, raising

aggregate gross proceeds of $7,411,508 (the “Offering”).

Pursuant to the Offering, First Mining issued 20,412,995 units of the Company (the “Units”) at a price of

$0.27 per Unit for gross proceeds of $ 5,511,508, and 5,277,777 flow-through units of the Company (the

“FT Units”) at a price of $0.36 per FT Unit for gross proceeds of $1,900,000.

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

entitle the holder to acquire one common share of the Company at a price of $0.40 at any time prior to

the date which is three years following the closing date of the Offering.

Each FT Unit consists of one flow-through common share of the Company that qualifies as a “flow-through

share” for the purposes of the Income Tax Act (Canada) (a “FT Unit Share”) and one-half of one Warrant

on the same terms as the Warrants forming part of the Units.

The Unit Shares, the FT Unit Shares and the Warrants issued pursuant to the Offering are subject to a hold

period under applicable Canadian securities laws of four months and one day from closing, expiring on

September 17, 2019.

The net proceeds from the sale of the Units issued 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 gross proceeds raised from the sale of the FT Units under the Offering will be used by the

Company 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), and as

“eligible Ontario exploration expenditures” for the purposes of the Taxation Act, 2007 (Ontario).

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 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 securities laws or an exemption

from such registration is available.

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 7.3 million ounces of gold in the Measured

and Indicated categories and 3.6 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, and we 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 s ecurities 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, 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 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 use of the net proceeds from the Offering; (ii) the use of the gross proceeds from the sale of

the FT Units issued under the Offering to fund exploration programs that qualify as CEE; (iii) the Company’s focus on

advancing its as sets 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,

TSX: FF

OTCQX: FFMGF

FRANKFURT: FMG

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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

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 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. standards,

mineralization may not be classified as a "reserve” unless the determination has been ma de 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 feasi bility 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 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.