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First Mining Announces Appointment of New Chief Financial Officer

Management Changes

TSX: FF

OTCQX: FFMGF

FRANKFURT: FMG

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NEWS RELEASE

First Mining Announces Appointment of New Chief Financial Officer

August 11, 2022 – Vancouver, BC – First Mining Gold Corp. (“First Mining” or the “Company”) (TSX: FF)

(OTCQX: FFMGF) (FRANKFURT: FMG) is pleased to announce the appointment of Lisa M. Peterson as the

Company’s Chief Financial Officer effective September 16, 2022.

Lisa has over 14 years’ experience within the mining, renewable energy, infrastructure, and professional

services industries. Her most recent positions include serving as Chief Financial Officer of Libero Copper

& Gold Corporation and Zacapa Resources Corporation. Lisa previously held the role of Vice-President of

Corporate Reporting & Global Accounting at SkyPower Global, a large -scale, international, renewable

energy developer, and provider. Prior to joining SkyPower Global, Lisa served 3 years at Barric k Gold

Corporation as Chief of Staff Capital Projects and Chief of Staff of the Frontera District within their

technical services, project development, and life of mine planning group. In these roles, she helped

advance large-scale projects, liaised with s takeholders and joint venture partners, and performed value

assurance reviews on the companies’ operating and expansion assets. Prior to joining Barrick, Lisa spent

5 years working at KGHM leading their international Corporate Reporting group. Lisa started her career

at KPMG. She is a Chartered Professional Accountant (CPA, CA) and holds a Bachelor of Business

Administration degree from Simon Fraser University.

Lisa will replace Andy Marshall, who will be leaving his role at First Mining , effective August 1 2, 2022,

having notified the Company that he will be pursuing another opportunity in the mining industry.

“We would like to thank Andy for his service and dedication to First Mining. As the Company’s longest

standing employee, he has been a key part of the development of First Mining since 2015, and we wish

Andy well in his future endeavours” stated Dan Wilton, CEO of First Mining. “We are very pleased to have

Lisa join the First Mining team. Her background in mining and project development makes her a great fit

with our focus on advancing Springpole and Duparquet gold projects . We know Lisa will be a great

contributor to unlocking the value of our portfolio of world class gold assets”.

About First Mining Gold Corp.

First Mining is a gold developer advancing a portfolio of gold projects in Canada, with our most advanced

project being the Springpole Gold Project in northwestern Ontario, wh ich is one of the largest

undeveloped gold projects in Canada, and where we have commenced a Feasibility Study and permitting

activities are on-going with a draft Environmental Impact Statement (“EIS”) for the project submitted in

June 2022. First Mining also own s the Cameron, Duparquet, Duquesne and Pitt gold projects, all

advanced-stage gold projects in Ontario (in the case of Cameron) and Québec. Our portfolio of gold

project interests also includes the Pickle Crow gold project (being advanced in partnership with Auteco

Minerals Ltd.), the Hope Brook gold project (being advanced in partnership with Big Ridge Gold Corp.), an

equity interest in Treasury Metals Inc., and a portfolio of 21 gold royalties.

First Mining was established in 2015 by Mr. Keith Neumeyer, founding President and CEO of First Majestic

Silver Corp.

TSX: FF

OTCQX: FFMGF

FRANKFURT: FMG

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ON BEHALF OF FIRST MINING GOLD CORP.

Daniel W. Wilton

Chief Executive Officer and Director

For further information, please contact:

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”, "anticipates”, "believes”, “plans”, “projects”, "intends”, "estimates”, “envisages”,

"potential”, "possible”, “strategy”, “goals”, “opportunities”, “objectives”, “targeted”, “advancing”, “proving” 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) t he date of appointment of Lisa M. Peterson as the Company’s Chief Financial Officer and her

future contributions in unlocking the value of the Company’s portfolio of gold projects; (ii) the Company’s plans with

respect to advancing its portfolio of gold projects; (ii i) Feasibility and permitting activities related to the Springpole

Gold Project; and (iv) realizing the value of the Company’s gold projects for the Company’s shareholders. All forward-

looking statements are based on the Company’s or its consultants' current beliefs as well as v arious 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 achieve ments 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 materially 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, pandemics 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 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, 2021 filed with the Canadian sec urities 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.

TSX: FF

OTCQX: FFMGF

FRANKFURT: FMG

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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 mak e 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, t hat may be made from time to time by the

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