TORONTO - Alamos Gold Inc. (TSX: AGI; NYSE: AGI) ('Alamos' or the 'Company') today reported new results from surface and underground exploration drilling at the Island Gold mine, further extending high-grade gold mineralization in Island East and West.

All reported drill widths are true width of the mineralized zones, unless otherwise stated.

Island East: high-grade gold mineralization extended 20 metres ('m') east from the nearest Inferred Mineral Resource block, over significantly greater widths. This included the best hole drilled to date, 45 m down-plunge from the previous best surface directional hole MH25-04 (28.97 g/t Au (27.96 g/t cut) over 21.76 m). MH25-08 and the previously reported MH25-04 have true widths approximately four times greater than the average width of the large high-grade Inferred Resource block up-plunge, demonstrating the zone has widened in this area.

New highlights include: Island West: underground directional drilling extended high-grade gold mineralization 50 m below the nearest Inferred Mineral Resource block and partially closed the 185 m gap between two high-grade Inferred Mineral Resource blocks. New highlights include: Note: Drillhole composite intervals reported as 'cut' may include higher grade samples which have been cut to 185 g/t Au for the Island East Area, and 225 g/t for Island Main and West.

'Over the past year, ongoing exploration success has driven another one million ounce increase in Mineral Reserves and Resources at Island Gold and returned the two best intersections to date. We expect these new results to drive further Mineral Resource growth in one of the highest grade portions of the ore body. This already large Mineral Resource block in Island East is in proximity to the planned shaft and remains open laterally and down-plunge demonstrating further significant upside to the Phase III Expansion,' said John A. McCluskey, President and Chief Executive Officer.

About Alamos

Alamos is a Canadian-based intermediate gold producer with diversified production from three operating mines in North America. This includes the Young-Davidson and Island Gold mines in northern Ontario, Canada and the Mulatos mine in Sonora State, Mexico. Additionally, the Company has a significant portfolio of development stage projects in Canada, Mexico, Turkey, and the United States. Alamos employs more than 1,700 people and is committed to the highest standards of sustainable development. The Company's shares are traded on the TSX and NYSE under the symbol 'AGI'.

Contact:

Scott K. Parsons

Tel: (416) 368-9932

Cautionary Note

This news release includes certain statements that constitute forward-looking information within the meaning of applicable Canadian and U.S. securities laws ('forward-looking statements'). All statements in this news release, other than statements of historical fact, which address events, results, outcomes or developments that Alamos expects to occur are forward-looking statements. Forward-looking statements are generally, but not always, identified by the use of forward-looking terminology such as 'continue', 'focus', 'estimate', or 'potential' or variations of such words and phrases and similar expressions or statements that certain actions, events or results 'may', 'could', 'would', 'might' or 'will' be taken, occur or be achieved or the negative connotation of such terms. In particular, this news release contains forward-looking statements including, without limitation, with respect to the 2021 surface exploration drilling program at the Island Gold mine, the estimation of Mineral Resources, exploration results, potential mineralization, changes in Mineral Resources and Mineral Reserves, Island Gold's Phase III expansion and other information that is based on forecasts and projections of future operational, geological or financial results, estimates of amounts not yet determinable and assumptions of management.

Exploration results that include geophysics, sampling, and drill results on wide spacings may not be indicative of the occurrence of a mineral deposit. Such results do not provide assurance that further work will establish sufficient grade, continuity, metallurgical characteristics and economic potential to be classed as a category of Mineral Resource. A Mineral Resource that is classified as 'Inferred' or 'Indicated' has a great amount of uncertainty as to its existence and economic and legal feasibility. It cannot be assumed that any or part of an 'Indicated Mineral Resource' or 'Inferred Mineral Resource' will ever be upgraded to a higher category of Mineral Resource. Investors are cautioned not to assume that all or any part of mineral deposits in these categories will ever be converted into Proven and Probable Mineral Reserves.

Forward-looking statements are necessarily based upon a number of factors and assumptions that, while considered reasonable by management at the time of making such statements, are inherently subject to significant business, economic, technical, legal, political and competitive uncertainties and contingencies. Known and unknown factors could cause actual results to differ materially from those projected in the forward-looking statements, and undue reliance should not be placed on such statements and information.

Such factors and assumptions underlying the forward-looking statements in this news release include: the actual results of current exploration activities, conclusions of economic and geological evaluations, changes in project parameters as plans continue to be refined, operations may be exposed to widespread pandemic; the impact of the COVID-19 pandemic on the broader market; provincial and federal orders or mandates (including with respect to mining operations generally or auxiliary businesses or services required for our operations) in Canada, Mexico, the United States and Turkey; the duration of regulatory responses to the COVID-19 pandemic; changes in national and local government legislation, controls or regulations, failure to comply with environmental and health and safety laws and regulations; labour and contractor availability (and being able to secure the same on favourable terms); disruptions in the maintenance or provision of required infrastructure and information technology systems; fluctuations in the price of gold or certain other commodities such as, diesel fuel, natural gas, and electricity; operating or technical difficulties in connection with mining or development activities, including geotechnical challenges and changes to production estimates (which assume accuracy of projected ore grade, mining rates, recovery timing and recovery rate estimates and may be impacted by unscheduled maintenance; changes in foreign exchange rates (particularly the Canadian dollar, U.S. dollar, Mexican peso and Turkish Lira); the impact of inflation; employee and community relations; litigation and administrative proceedings; disruptions affecting operations; availability of and increased costs associated with mining inputs and labour; delays with the Phase III Expansion Project at the Island Gold mine; inherent risks and hazards associated with mining and mineral processing including environmental hazards, industrial accidents, unusual or unexpected formations, pressures and cave-ins; the risk that the Company's mines may not perform as planned; uncertainty with the Company's ability to secure additional capital to execute its business plans; the speculative nature of mineral exploration and development, risks in obtaining and maintaining necessary licenses, permits and authorizations, contests over title to properties; expropriation or nationalization of property; political or economic developments in Canada, Mexico, the United States, Turkey and other jurisdictions in which the Company may carry on business in the future; increased costs and risks related to the potential impact of climate change; the costs and timing of construction and development of new deposits; risk of loss due to sabotage, protests and other civil disturbances; the impact of global liquidity and credit availability and the values of assets and liabilities based on projected future cash flows and business opportunities that may be pursued by the Company.

The Company disclaims any intention or obligation to update or revise any forward-looking statement, whether written or oral, or whether as a result of new information, future events or otherwise, except as required by applicable law.

Cautionary Note to U.S. Investors - Mineral Reserve and Resource Estimates

All resource and reserve estimates included in this news release have been prepared in accordance with Canadian National Instrument 43-101 - Standards of Disclosure for Mineral Projects ('NI 43-101') and the Canadian Institute of Mining, Metallurgy and Petroleum (the 'CIM') - CIM Definition Standards on Mineral Resources and Mineral Reserves, adopted by the CIM Council, as amended (the 'CIM Standards'). NI 43-101 is a rule developed by the Canadian Securities Administrators, which established standards for all public disclosure an issuer makes of scientific and technical information concerning mineral projects. The terms 'Mineral Reserve', 'Proven Mineral Reserve' and 'Probable Mineral Reserve' are Canadian mining terms as defined in accordance with NI 43-101 and the CIM Standards. Investors are cautioned not to assume that all or any part of mineral deposits in these categories will ever be converted into reserves. '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, estimates of Inferred Mineral Resources may not form the basis of feasibility or pre-feasibility studies, except in very limited circumstances. 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 Mineral Resource is permitted disclosure under Canadian regulations.

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