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First Mining Announces Additional Drill Results From its Goldlund Gold Project, Ontario, Canada Further Results from Drilling at Zones 2 and 3 in the Goldlund Main Zone

Drill Results

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NEWS RELEASE

First Mining Announces Additional Drill Results From its

Goldlund Gold Project, Ontario, Canada

Further Results from Drilling at Zones 2 and 3 in the Goldlund Main Zone

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

(OTCQX: FFMGF) (FRANKFURT: FMG) is pleased to announce additional results from the 2020 drill

program at the Company’s wholly -owned Goldlund Gold Project (“Goldlund”) in northwestern Ontario,

Canada. Drilling to date continues to define mineralization in the eastern and western portions of the

defined resource area at Goldlund ( the “Main Zone”) and provides important geological information on

the structural and lithological controls of gold mineralization around the Main Zone.

Latest highlights from holes drilled at the Main Zone include:

• Hole GL-20-010 intersected 1.20 grams per tonne gold (“g/t Au”) over 44.0 metres (“m”)

o Including 1.94 g/t Au over 17.0 m; and

o Including 15.90 g/t Au over 1.0 m

• Hole GL-20-006 intersected 2.10 g/t Au over 13.0 m

o Including 12.07 g/t Au over 1.0 m; and

o Including 1.67 g/t Au over 9.0 m

“We are pleased with the continuing mineralization intersected by our recent drill program”, stated Dan

Wilton, CEO of First Mining. “Our work at Goldlund continues to enlarge the areas of known mineralization

and highlight the Project’s expansion potential, while at the same time giving us a better understanding

of how the mineralization is structured around the resource.”

The 19 holes highlighted in this news release include both infill and step -out holes designed to test the

area between Zones 2 and 3 . Seventeen of these holes are located approximately 1.5 kilometres

southwest along strike from the first 11 holes drilled in this program which targeted the northeast

extensions of Zones 2 and 3. Hole GL-19-034 targeted the northeast extension of Zone 2. The majority of

the remaining holes reported in this news release targeted the southwestern extension of Zone 3 and the

area between Zones 2 and 3. Hole GL-20-004 intersected both Zones 2 and 3 in their southwest extension.

Hole GL-20-016 targeted the southwest extension of Zone 4. Most of the mineralization intercepted by

these holes is associated with altered porphyry units. Minor mineralization is also associated with gabbro

and basalt/andesite, and mainly occurs in close proximity to the contacts with porphyry. The highest -

grade gold mineralization was intersected in holes GL-20-010 (44 metres at 1.20 g/t Au) and GL-20-006

(13 metres at 2.10 g/t Au) which were drilled vertically through Zone 3.

The 2019 - 2020 drill program at the Main Zone has so far consisted of 39 drill holes for a total of 7,300

metres, focused primarily on Zones 2 and 3. Drilling was completed on approximate 50 metre spacing.

The goal of this drill program is to define and extend mineralization in the eastern and western portions

of the Main Zone area. This news release incorporates results from 19 of the 39 holes completed to date

(following on from the Company’s March 2, 2020 news release which announced the results of the first

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11 holes), with results from the final 11 holes of the drill program to be released as assay results become

available, and prior to resuming the 2020 main zone drill program.

Select assay results from these 19 holes from the Main Zone drill program are reported below:

Hole ID From (m) To (m) Length (m) Au g/t Target

GL-19-021 139.00 140.0 1.00 9.19 Main Zone

and 188.00 191.00 3.00 3.20 (Zone 3)

including 188.00 189.00 1.00 6.54

and 286.00 288.61 2.61 1.97

including 286.00 286.70 0.70 6.64

GL-19-034 25.94 27.17 1.23 8.63 Main Zone

and 30.72 31.20 0.48 1.81 (Zone 2)

and 53.00 55.00 2.00 1.46

and 60.00 62.00 2.00 3.40

GL-20-006 153.00 211.00 58.00 0.83 Main Zone

including 153.00 166.00 13.00 2.10 (Zone 3)

and including 161.00 162.00 1.00 12.07

and including 165.00 166.00 1.00 5.10

and including 202.00 211.00 9.00 1.67

and including 208.00 209.00 1.00 9.00

GL-20-010 119.00 122.00 3.00 3.06 Main Zone

including 120.00 121.00 1.00 7.86 (Zone 3)

and 148.00 192.00 44.00 1.20

including 152.00 153.00 1.00 6.70

and including 166.00 183.00 17.00 1.94

and including 182.00 183.00 1.00 15.90

and 199.00 210.00 11.00 0.26

Notes:

• Assaying for the Goldlund 2019-2020 drill program is being completed by SGS Canada Inc. (“SGS”) at their laborator ies in

Red Lake, Ontario and Vancouver, BC. Prepared 50 g samples are analyzed for gold by lead fusion fire assay with an atomic

absorption spectrometry finish. Multi -element analysis is also being completed on selected holes by two -acid aqua regia

digestion with ICP-MS and AES finish.

• Reported widths are drilled core lengths; true widths are unknown at this time. Assay values are uncut.

• Intervals for holes GL-20-006 and GL-20-010 include results of selected assay repeats. These repeats were done by screened

metallic fire assay on 1 kg size samples at the SGS laboratory in Vancouver, BC.

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Geological Highlights

This new drilling once again highlights that mineralization at Goldlun d is structurally controlled and can

be associated with lithological units other than the granodiorite (tonalite) that is the main host for the

Zone 1 and 7 gold mineralization which comprises approximately 70% of the current resource.

As with the last el even reported holes, th ese latest 19 drill holes within Zones 2 and 3 encountered

mineralization within locally silicified, sheared and variolitic andesites, as well as gabbros and altered

porphyries, with gold mineralization typically associated with quartz-ankerite veining and alteration halos

associated with the veining (as is also typical of the “Goldlund -style” of mineralization present in

granodiorite). Gold mineralization associated with andesite was not previously recognized at Goldlund

and hence this association provides a new exploration horizon at the Project. The drilling completed so

far in 2020 continues to provide important geological information on the structural and lithological

controls of gold mineralization in and around the main resource area at Goldlund.

Drill Result Details

A plan map showing the drill hole locations and assay status at the Main Zone can be viewed at:

https://www.firstmininggold.com/_resources/news/GLD_NR_May_Plan_Map.pdf

A cross section showing drill results and highlights for hole s GL-20-010 and GL-20-011 can be viewed at:

http://www.firstmininggold.com/_resources/news/GLD_NR_May_XSection.pdf

A complete list of the 2019 - 2020 drill results to date, including hole details, can be viewed at:

https://www.firstmininggold.com/_resources/news/2020-05-06-FF-NR-Goldlund-2019and2020-Drill-

Results.pdf

Drill Hole Locations

Hole ID Azimuth ⁰ Dip ⁰ Final Depth (m) UTM East UTM North

GL-19-021 0 -90 386 546100 5527506

GL-19-022 0 -50 173 546100 5527506

GL-19-034 335 -45 74 547774 5528162

GL-20-001 0 -90 314 546099 5527538

GL-20-002 0 -90 293 546150 5527548

GL-20-003 0 -90 206 546150 5527576

GL-20-004 0 -55 194 546150 5527576

GL-20-005 0 -90 188 546200 5527550

GL-20-006 0 -90 221 546200 5527525

GL-20-007 0 -90 83 546250 5527530

GL-20-008 0 -90 203 546250 5527530

GL-20-009 0 -90 125 546250 5527555

GL-20-010 0 -90 218 546295 5527527

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Hole ID Azimuth ⁰ Dip ⁰ Final Depth (m) UTM East UTM North

GL-20-011 0 -75 164 546295 5527527

GL-20-012 0 -90 263 546350 5527559

GL-20-013 0 -55 122 546350 5527559

GL-20-014 0 -90 188 546400 5527566

GL-20-015 0 -90 191 546388 5527591

GL-20-016 0 -70 206 546338 5527332

QA/QC Procedures

The QA/QC program for the 2019 -2020 drilling program at Goldlund consists of the submission of

duplicate samples and the insertion of Certified Reference Materials and blanks at regular intervals. These

are inserted at a rate of one standard for every 20 samples (5% of total) and one blank for every 30

samples (3% of total). The standards used in the 2019-2020 Goldlund drilling program range in grade from

0.5 g/t Au to 9.0 g/t Au, and are sourced from CDN Resource Laboratories in Langley, BC. Blanks have been

sourced locally from barren granitic material.

Field duplicates from quartered core, as well as 'coarse' or 'pulp' duplicates taken from coarse reject

material or pulverized splits, are also submitted at regular intervals with an insertion rate of 4% for field

duplicates and 4% for coarse or pulp duplicates. Additional selected duplicates are being submitted to an

umpire lab for check assaying. SGS also undertakes its own internal coarse and pulp duplicate analysis to

ensure proper sample preparation and equipment calibration.

Qualified Person

Hazel Mullin, P.Geo., Director, Data Management and Technical Services of First Mining, is a “Qualified

Person” for the purposes of NI 43 -101, and she has reviewed and approved the scientific and technical

disclosure contained in this news release.

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 explora tion stage asset where drilling in

2020 is planned to define both the extension of the existing resource area and to better define the regional

scale 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.

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ON BEHALF OF FIRST MINING GOLD CORP.

Daniel W. Wilton

Chief Executive Officer and Director

For further information, please contact:

Spiros Cacos | Vice President, Investor Relations

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, identified by

words such as "expects”, "anti cipates”, "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 timing for the receipt of outstanding assays from the 2019 - 2020 drill program at the Main

Zone and the interpretation of the results of such assays ; (ii) the goal of the 2019 - 2020 drill program at the Main

Zone being to define and extend mineralization in the eastern and western portions of the Main Zone area ; (iii) the

potential for a new exploration horizon at Goldlund due to the results from the 2019 - 2020 drill program at the Main

Zone indicating that g old mineralization at the Project is associated with andesite ; (iv) the timeframe for the

suspension of operations at Goldlund due to the current COVID-19 pandemic; (v) the timeframe of the current COVID-

19 pandemic and the potential for plans to be adjusted further as the situation evolves; (v i) the Company’s primary

focus on developing and permitting Springpole and the advanced exploration of Goldlund; and (vii) 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 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, polit ical 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 Company’s business, operations and financial condition potentially being mater ially

adversely affected by the outbreak of epidemics, pandemics or other health crises, such as COVID-19, and by reactions

by government and private actors to such outbreaks; risks to employee health and safety as a result of the outbreak

of epidemics, pa ndemics or other health crises, such as COVID -19, that may result in a slowdown or temporary

suspension of operations at some or all of the Company's mineral properties as well as its head office; 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 developme nts; risks and hazards associated with the

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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, 2019 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” 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 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 i n 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 mineab le. 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 grad e 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 standa rds.

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.