Radisson expands O'Brien drill program to 140,000 m

Mr. Matt Manson reports RADISSON EXPANDS ONGOING STEP-OUT DRILL PROGRAM AT O'BRIEN TO 140,000 METRES Radisson Mining Resources Inc. will expand the continuing stepout exploration drill program at the O'Brien gold project to 140,000 metres utilizing up to eight drill rigs. The expanded program aims to build upon recent successes in delineating new high-grade gold mineralization outside the scope of the project's current mineral resource estimate (MRE). This will be the largest drill program in the history of the project. Matt Manson, president and chief executive officer, commented: "Following the recent completion of our very successful $25-million financing (see Radisson news release dated Oct. 7, 2025), we are announcing a major increase in scope and ambition to our exploration drill program at O'Brien. Since late last year, we have been demonstrating significant new gold mineralization in proof-of-concept drilling beneath the current mineral resources and below the historic mine workings. Our exploration target at O'Brien is between three and four million ounces of gold in 15 to 20 million tonnes at between 4.5 and 8.0 grams per tonne gold. This is based on the proposition that O'Brien's mesothermal gold mineralization continues to an exploration horizon of at least two kilometres depth. With recent results supporting this thesis, we now intend to accelerate our efforts with a view to meaningful resource growth at the project. The new expanded program of 140,000 metres will continue through 2026 with up to eight drill rigs, generating significant new data, updates to the project's MRE and regular news flow." Mr. Manson continued: "The recently completed O'Brien preliminary economic assessment (PEA) describes a high-value project based on the use of neighbouring milling facilities for the processing of mined material, reducing capital costs, development risk and project footprint (see Radisson news release dated July 9, 2025). It also represents a moment-in-time snapshot for the project utilizing the pre-existing MRE, which is located primarily at depths above 600 metres and based on drilling completed to the end of 2022. Our objective by the end of this new and aggressive drill program will be to demonstrate full potential scope of the project." Stepout drilling at O'Brien Since late 2024, Radisson has been pursuing a program of broad stepouts beneath the historic O'Brien gold mine and the existing mineral resources designed to test the full scope of mineralization at the project to a two-kilometre-deep exploration floor. This drilling is accomplished with pilot holes followed by wedges and directional drilling to maximize drill efficiency. The first pilot hole drilled beneath the historic mine workings of the O'Brien mine intersected 31.24 grams per tonne gold over 8.0 metres, including 242.0 grams per tonne gold over 1.0 metre at approximately 1,500 metres vertical depth, 500 metres below the final mining stope. Assay results from seven wedges from this pilot holes have now been reported (see Radisson's news release dated July 16, 2025) and up to six high-grade, gold-bearing veins have been delineated over an area of approximately 250 metres (east-west) by 250 metres (vertical). Assay results from additional wedges are expected shortly. Stepout drilling with wedge extensions has also confirmed high-grade mineralization 170 metres below the base of the existing mineral resources at trend No. 1 and up to 300 metres below previous drill intercepts at trend No. 2 (see Radisson's news release dated Sept. 8, 2025). By the end of 2025, Radisson expects to have completed approximately 35,000 metres of a 50,000-to-60,000-metre drill program originally announced in May, 2025 (see Radisson's news release dated May 21, 2025). With the new drilling announced today, the total metres drilled in this continuing stepout program will increase to 140,000 metres. This will incorporate an expansion of site facilities and personnel to support up to eight drill rigs from the current four. These rigs have already been secured under the terms of engagement with the company's existing drill contractor. The first additional drill rig has been mobilized to site, with drilling expected to start prior to the end of this month. Targeting priorities will be developed dynamically based on results, but will include: (a) multiple pilot holes and wedge clusters beneath the historic mine to two kilometres depth; (b) pilot holes and wedges testing the deep extensions of trends No. 0, No. 1 and No. 2; (c) testing for mineralization between trends No. 1 and No. 2; and (d) testing the extension of gold mineralization beneath the historic Thompson-Cadillac mine located west of the O'Brien mine. Updated mineral resource estimates The MRE utilized in the recent O'Brien PEA comprises indicated mineral resources of 580,000 ounces (2.20 million tonnes at 8.2 grams per tonne gold) and inferred mineral resources of 930,000 ounces (6.67 million tonnes at 4.4 grams per tonne gold). Mineral resources that are not mineral reserves do not have demonstrated economic viability. This MRE, effective as of May 6, 2025, is based on 325,509 metres of drilling completed to the end of 2022. By the end of the currently scheduled drill program, a significant amount of new drilling will have been completed, the larger part being outside the scope of the current MRE and recent PEA mine design. This is expected to merit multiple updates to the O'Brien MRE as the drilling progresses. Gold mineralization at O'Brien Gold mineralizing quartz-sulphide veins at O'Brien occur within a thin band of interlayered mafic volcanic rocks, conglomerates and porphyritic andesitic sills of the Piche group occurring in contact with the east-west-oriented Larder Lake/Cadillac Break (LLCB). Gold, along with pyrite and arsenopyrite, is typically associated with shearing and a pervasive biotite alteration and developed within multiple Piche group lithologies and, occasionally, the hangingwall Pontiac and footwall Cadillac metasedimentary rocks. As mapped at the historic O'Brien mine and now replicated in the modern drilling, individual veins are generally narrow, ranging from several centimetres up to the metre-scale in thickness. Multiple veins occur subparallel to each other as well as subparallel to the Piche lithologies and the LLCB. Individual veins have well-established lateral continuity, with near-vertical, high-grade shoots developed over significant lengths. Based on the historic data available, it is clear that the former mine was high graded, with mining focused on a main central stope and parallel veins identified but left undeveloped. The historic O'Brien mine produced over half a million ounces of gold from such veins and shoots at an average grade exceeding 15 grams per tonne gold and over a vertical extent of at least 1,000 metres. Modern exploration has focused on delineating well-developed vein mineralization to the east of the historic mine, with additional high-grade shoots becoming evident in the exploration data over what has been described as a series of repeating trends (trends No. 0 to No. 5). Qualified persons Disclosure of a scientific or technical nature in this news release was prepared under the supervision of Richard Nieminen, PGeo (Quebec), a geological consultant for Radisson and a qualified person for purposes of National Instrument 43-101. Luke Evans, MSc, PEng, Ing, of SLR Consulting (Canada) Ltd., is the qualified person responsible for the preparation of the MRE at O'Brien. Each of Mr. Nieminen and Mr. Evans is independent of Radisson and the O'Brien gold project. About Radisson Mining Resources Inc. Radisson is a gold exploration company focused on its 100-per-cent-owned O'Brien gold project, located in the Bousquet-Cadillac mining camp along the world-renowned Larder Lake/Cadillac Break in Abitibi, Quebec. A July, 2025, preliminary economic assessment described a low-cost and high-value project with an 11-year mine life and significant upside potential based on the use of existing regional infrastructure. Indicated mineral resources are estimated at 580,000 ounces (2.20 million tonnes at 8.2 grams per tonne gold), with additional inferred mineral resources estimated at 930,000 ounces (6.67 million tonnes at 4.4 grams per tonne gold). Please see the NI 43-101 "O'Brien Gold Project Technical Report and Preliminary Economic Assessment, Quebec, Canada," effective June 27, 2025, and other filings made with Canadian securities regulatory authorities available on SEDAR+ for further details and assumptions relating to the O'Brien gold project. We seek Safe Harbor.