Montreal, Quebec--(Newsfile Corp. - September 23, 2026) - Harfang Exploration Inc. (TSXV: HAR) ("Harfang" or the "Company") is pleased to announce that it has submitted exploration permit applications for its Sky Lake, Blakelock, and Menarik West properties (see Figure 1), in anticipation of planned winter 2027 diamond drilling programs at each project.

The planned programs represent a significant advancement of Harfang's exploration portfolio and are designed to follow up on encouraging results generated through the Company's recent exploration activities, while testing new high-priority targets identified through ongoing geological work.

"We are very pleased to be moving forward with permitting for three drill programs that collectively represent some of the most important exploration opportunities in Harfang's portfolio," said Rick Breger, President and CEO of Harfang Exploration. "At Sky Lake, we are looking to build on a successful first phase of drilling and test the potential for additional high-grade mineralized shoots. Blakelock represents an entirely new drilling opportunity for Harfang, with a large land position along the Casa Berardi deformation zone and an extensive body of geological and geophysical data now being integrated into our targeting model. At Menarik West, our partnership with SOQUEM allows us to advance a series of compelling targets with the upcoming program fully funded under the terms of our partnership."

Sky Lake - Follow-up Drilling at the Koval Zone

The Sky Lake Property is located 35 km southwest of Pickle Lake, Ontario. Harfang is planning follow-up drilling within the Koval Zone, building on the positive results of the Company's winter 2025 drill program that returned high-grade gold intercepts, including: 7.0 g/t Au over 18.0 metres; and 4.5 g/t Au over 15.6 metres. The 2025 program also provided important geological and structural information supporting the interpretation of a main mineralized shoot within the Koval Zone (see news releases dated May 14 and 28, 2025).

The planned winter 2027 program will focus on drilling along strike within the Koval Zone, with the objective of testing the potential for additional mineralized shoots and expanding the known mineralized system. Harfang believes that the combination of high-grade gold mineralization, favourable structural controls, and the significant strike extent of the Koval Zone warrant further systematic drilling.

The Company continues to positively engage with the Mishkeegogamang Ojibway Nation ("MON") following completion of the Traditional Knowledge and Land Use Study ("TKLUS"). Harfang is working collaboratively with MON to formalize the relationship and ensure alignment as the Company advances its planned winter 2027 exploration program.

Blakelock - Maiden Drill Program

At the Blakelock Property, located 50 km west of Orezone's Casa Berardi Gold Mine and in the Archean Abitibi region of Ontario, Harfang is planning its maiden diamond drill program. This program represents the next major phase of exploration on the property since it consolidated the asset through the Company's acquisition of NewOrigin Gold Corp. in November 2024.

The Blakelock property encompasses approximately 25 kilometres of prospective ground along the Casa Berardi deformation zone, a major regional structure that hosts several gold and polymetallic deposits, including the Casa Berardi Gold Mine.

Since consolidating the property, Harfang has undertaken an extensive compilation and reinterpretation of historical geological, geochemical, and geophysical data. The Company has also been acquiring and advancing new induced polarization ("IP") geophysical information to improve its understanding of the underlying geology and identify priority drill targets. This work is being incorporated into an updated three-dimensional geologic model that will guide the selection and prioritization of drill holes for the planned winter 2027 campaign.

Menarik West - SOQUEM-Funded Drill Program

At the Menarik West Property in James Bay, Québec, Harfang is planning a winter 2027 drill program in partnership with, and fully funded by, SOQUEM, pursuant to the parties' Option and Joint Venture Agreement (see news release dated July 29, 2025).

The program will test a series of high-priority targets generated through extensive exploration conducted by Harfang and SOQUEM. Priority areas include the Cox and Pierre zones, where recent exploration has identified multiple compelling targets for follow-up drilling.

The planned drilling will be designed to test these priority targets and further evaluate the potential for additional mineralization across the Menarik West property. As operator of the SOQUEM-funded exploration program, Harfang will oversee the execution of the winter 2027 drilling campaign.

About Harfang Exploration Inc.

Harfang is a discovery-driven mineral exploration company focused on identifying and advancing high-potential ore deposits in Québec and Ontario. The Company leverages rigorous geoscience, disciplined capital deployment, and a partnership-oriented mindset to maximize discovery potential. Harfang is run by a team of enthusiastic industry professionals with varied experience and a proven track record. In November 2024, Harfang completed the acquisition of NewOrigin Gold Corp., consolidating high-quality gold assets, including properties in the Pickle Lake and Abitibi regions. Harfang is committed to sustainable exploration practices, engaging closely with local stakeholders, and prioritizing environmental stewardship.

Qualified Person

Ludovic Bigot, P.Geo., VP Exploration of Harfang, reviewed and approved the technical information contained in this news release. Mr. Bigot is a qualified person within the meaning of National Instrument 43-101 on standards of disclosure for mineral projects.

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Cautionary Statement Regarding Forward-Looking Information

The information in this news release includes certain information and statements about management's view of future events, expectations, plans and prospects that constitute forward-looking statements. These statements are based upon assumptions that are subject to significant risks and uncertainties. Because of these risks and uncertainties and as a result of a variety of factors, the actual results, expectations, achievements or performance may differ materially from those anticipated and indicated by these forward-looking statements. Any number of factors could cause actual results to differ materially from these forward-looking statements as well as future results. Although Harfang believes that the expectations reflected in forward-looking statements are reasonable, it can give no assurances that the expectations of any forward-looking statements will prove to be correct. Except as required by law, Harfang disclaims any intention and assumes no obligation to update or revise any forward-looking statements to reflect actual results, whether as a result of new information, future events, changes in assumptions, changes in factors affecting such forward-looking statements or otherwise.

Neither the TSX Venture Exchange nor its Regulation Services Provider (as that term is defined in the policies of the TSX Venture Exchange) accepts responsibility for the adequacy or accuracy of this release.

Figure 1. Location map of Harfang's projects in Ontario and Eeyou Istchee James Bay, Québec.

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