First Mining Gold Corp. — Regulatory Filings 2021

Sep 29, 2021

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September 29, 2021

VIA SEDAR

British Columbia Securities Commission Alberta Securities Commission Financial and Consumer Affairs Authority of Saskatchewan Manitoba Securities Commission Ontario Securities Commission Autorité des marchés financiers, Québec Nova Scotia Securities Commission Financial and Consumer Services Commission (New Brunswick) Office of the Superintendent of Securities, Prince Edward Island Office of the Superintendent of Securities, Newfoundland and Labrador

Dear Sirs/Mesdames:

Re: First Mining Gold Corp. (the “Company”) Final Short Form Base Shelf Prospectus (the “Final Prospectus”)

We refer to the Final Prospectus of the Company dated September 29, 2021, relating to the offering of securities of the Company from time to time.

We consent to the reference to our name on the cover page and under the headings “ Legal Matters ” and “ Interests of Experts ” in the Final Prospectus.

We confirm that we have read the Final Prospectus and have no reason to believe that there are any misrepresentations in the information contained therein that are derived from our legal opinions referred to above or that are within our knowledge as a result of the services that we performed in connection with such opinion.

Yours truly,

(signed) “ Blake, Cassels & Graydon LLP ”

Blake, Cassels & Graydon LLP

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