Eagle Plains Reports Significant High-Grade Copper, Gold and Silver Mineralization at the Theory Project, Toodoggone DistrictCRANBROOK, BRITISH COLUMBIA / ACCESS Newswire / January 21, 2026 / Eagle Plains Resources Ltd. (TSXV:EPL)(OTCQB:EGPLF) ("EPL" or "Eagle Plains") is pleased to announce that partner Sun Summit Minerals Corp. (TSXV:SMN)(OTCQB:SMREF) ("Sun Summit") has received final analytical and petrographic results from the 2025 field program at Eagle Plains' Theory copper-gold project (the "Theory Project"), north-central British Columbia. The property is owned 100% by Eagle Plains, with 122 hectares of the property subject to an underlying 0.5% Net Smelter Royalty held by a third party.The Theory Project borders Thesis Gold's Ranch Project to the north and is located within 10 km to the northwest of Sun Summit's JD Project. Sun Summit has an exclusive option agreement with Eagle Plains to earn up to a 100% interest in the project, located in the highly prospective Toodoggone Mining District.2025 HighlightsNew high grade copper discovery: Saboteur Zone3km length zone of copper mineralization associated with coincident magnetic high transition zone and strong radiometric potassic alteration anomaly15 of the rock samples collected returned over 1% CuGrab sample LSTHR040: 4.78% copper, 0.635 g/t gold, 49 g/t silver;Fred-DM-DMR Zone:1.6 km x 3km zone of copper mineralization associated with barite veiningGrab sample BLTHR051: 6.42% copper, 0.088 g/t gold, 99 g/t silver;Grab sample JBTHR008: 0.65% copper, 12.6 g/t gold, 3150 g/t silver;BEV Zone:Broad copper soil and silt geochemical anomaly associated with multiphase alterationGrab sample BLTHR029: 1.44% copper, 0.043 g/t gold, 12.8g/t silver;Table 1. 2025 Rock Sample HighlightsSampleZoneCu %Au g/tAg g/tBLTHR051Fred/DM6.420.08899.0JBTHR008Fred/DM0.6512.603150.0LSTHR040Saboteur4.780.63548.6JBTHR059Saboteur4.020.59661.1MHTHR037Saboteur3.274.290121.0JBTHR010Bev-N2.730.25517.2LSTHR020Saboteur2.80.00257.4BLTHR029Bev-Main1.440.04312.8THTHR032Bev-Main0.10.1690.3Chuck Downie, P.Geo., President and CEO of Eagle Plains, commented, "We are very excited by the results from the first fieldwork at the Theory Project in over thirty years, which underscores the unexplored nature and exceptional geology of the property. Ground truthing of anomalies generated through airborne geophysical and remote sensing surveys directly resulted in the Saboteur discovery, a multi kilometer scale zone of copper mineralization. Advanced petrographic analyses, combined with field mapping of extensive hydrothermal alteration zones and copper-gold-silver geochemical anomalies indicates the presence of a proximal buried porphyry system. We eagerly look forward to the 2026 field program, and working with Niel and Ken and the Sun Summit team to advance the property to drill testing."2025 Exploration ProgramThe 2025 exploration goals at the Theory Project were to identify and assess new areas of interest and to refine drill targets generated through integrating historical data with new geophysical and geochemical surveys. Eagle Plains and Sun Summit commissioned TerraLogic Exploration Inc. of Cranbrook, BC. to design and execute the 2025 satellite remote sensing data acquisition, and field programs.During the 14-day field program, a total of 258 rock grab samples, 417 soil samples, and 40 silt samples were collected, and geological and structural mapping was completed on primary target areas. Select samples were sent for petrographic analyses and interpretation.Comprehensive data interpretation and analyses is underway to define and prioritize targets for 2026 fieldwork and detailed IP geophysical surveys to generate and refine targets for diamond drill testing.Field ResultsAll primary targets of interest were prospected/geologically mapped and sampled. Most targets are underlain by mafic volcanic sequences of the Takla Group, with Jurassic Hazelton Group intermediate and mafic volcanics and related sediments encountered at the Stik, DAR and southernmost Bev areas. The volcanic stratigraphy is mostly homoclinal at scale of 100's to 1000+ meters, with shallow dips (15-35°) towards the N or NE the most common, such that a layer-cake stratigraphy approximates the general structural layout of the property - a pattern that is also evident in the airborne RTP magnetics.Many mineralized veins and fractures exploit bedding parallel structures, but there are also a significant number of steep mineralized structures with NE and NW strikes, with smaller subsets of E or N striking veins and fractures.The Takla group stratigraphy comprises a repetitive sequence of fine mafic tuff, feldspar ± pyroxene crystal tuff with some pillow basalt, trachyitic basalt, and crystal-lithic lapilli ± bomb proximal vent basalts. More mapping is required to establish the detailed relationship between mineralized structures and volcanic stratigraphy.The most common mineralized structures, comprise copper minerals (chalcopyrit