Northisle Copper and Gold Inc. announced that it has now released results from its 2023 Phase 2 drilling program at Northwest Expo which have expanded the gold-enriched mineralized envelope at Northwest Expo Zone 1 to approximately 600m of strike and 400m of dip, which is a 25% increase in the estimated strike length of the mineralized trend. In order to incorporate additional drilling which is underway as part of Phase 3, the Company now anticipates that the initial resource estimate at Northwest Expo Zone 1 will be completed by early 2024. In addition, to support the rapid advancement of this highly appealing target, the Company has now commenced metallurgical testing of all 2023 samples from Northwest Expo.

Assays from a total of 15 drill holes remain pending from Northwest Expo (8), Goodspeed (5) and Pemberton Hills (2). Drill results from Goodspeed are anticipated by December, with the balance to be released by early 2024. Summary of Northwest Expo 2023 Drill Results: key highlights from 2023 drilling at Northwest Expo including the significant intercepts arising from the five Phase 2 holes (NW23-14 through NW23-18) released now, which have demonstrated the extension of the targeted resource envelope and also support vectoring towards a potential larger porphyry center proximal to and south of Zone 1. Taken as a whole, results from 2023 drilling have shown that the causative source of mineralization in Zone 1 is to the south or southeast.

Grade improves, and higher temperature, lower pH clays, and fluorine bearing minerals increase towards the south of the deposit, which is nearer to surface and nearer to the hydrothermal fluid source. The holes released from Phase 2 (NW23-14 through NW23-18) were all targeted to test the limits of Zone 1 to the north, east and west, and are interpreted to be distal to the interpreted source. NW23-17 was the most significant of the results as it demonstrated that mineralization continues to the northwest by at least 100m, while the remainder of the results generally confirm the previous interpretation of the limits of mineralization to the north and east.

The majority of drill holes in Phase 3 have now been completed, with the final hole, NW23-26 currently in progress. Assays from all holes in Phase 3 remain pending. NW23-19 and NW23-22 were large step-outs to the southeast to aid in vectoring to the causative source of the lithocap hosted mineralization in Zone 1. NW23-20 and NW23-21 were targeted to infill east and west of the high-grade breccia with mineralized quartz-stockwork porphyry fragments identified in NW23-13 while NW23-23 is drilled targeting down dip of NW23-20.

NW23-24 was drilled to infill between NW23-09 and NW23-11. NW23-25 and NW23-26 are sequential step outs to the northwest following on the successful intercept of mineralization in NW23-17. Details of Drilling Results: 2023 drilling at Northwest Expo has been focused on better defining the mineralized area within Zone 1 with the goal of completing a resource estimate as well as seeking to better understand the potential causative source of the lithocap-hosted mineralization found in Zone 1. Zone 1 at Northwest Expo is underlain by Jurassic Bonanza Formation andesitic volcaniclastics, flows and feldspar porphyry dykes and minor diorite with intense silica-clay pyrite (SCP) alteration imposed upon them, as well as hydrothermal breccias and silica-brine immiscibility (SIM) or gusano textured rocks emanating from a large porphyry-related hydrothermal system, forming an aerially extensive mineralized lithocap, similar to Lepanto (Phillippines), Tuja (Indonesia) and Quimsacocha (Ecuador).

Mineralization occurs predominantly in unique characteristic quartz-chlorite-magnetite altered rocks (CMG) with varying amounts in SCP altered Bonanza Formation volcanic lithologies. NW23-14 was drilled down dip of NW23-13 and contained a significant intercept of mineralized chlorite-magnetite (CMG) and silica-clay-pyrite (SCP) alteration, at grades similar to other drilling to the east and west. NW23-15 was drilled down-dip of NW21-03 and NW23-18 and intercepted SCP alteration with anomalous but sub-economic grades of copper, molybdenum, gold and rhenium.