Coast Copper Corp. announced a National Instrument ("NI") 43-101 Mineral Resource Estimate (the "2023 MRE") for the gold-copper Merry Widow open pit located at its optioned Empire Mine property ("Empire Mine", "Empire" or the "Property"). The 2023 MRE updates and improves the 2008 MRE published by Grande Portage Resources Ltd. and should be considered Coast Copper's first proof of concept with the results feeding into a scoping study for a "hub and spoke" processing facility previously announced by Coast Copper.

Highlights from Coast Copper's 2023 MRE include: Geological proof of concept that copper-gold-magnetite mineralization is structurally controlled at intersections of both thrust and high angle faults, in addition to dyke margins, Inferred Mineral Resource Estimate of 81,322 ounces ("oz") gold equivalent ("AuEq") grading 3.52 grams per tonne ("g/t") gold ("AuEq") and 0.50% copper ("Cu") [4.258 g/t AuEq] contained within 0.59 million metric tonnes ("MT") (using a net smelter return ("NSR") cut-off of $30 CDN). Increase in average grade, and resource constrained to " reasonable prospects of eventual economic extraction" pit shell, conservative metal recoveries assumption of 60% Au and 77% Cu based on limited 2008 metallurgical work, Global in-situ strip ratio of 5.5:1.0 based on a conservative 50-degree pit slope angle, Geological model indicates potential targets on strike and at depth of current 2023 MRE, Merry Widow 2023 MRE represents only 200 meters ("m") strike length of an overall >2 kilometers ("km") trend. The Merry Widow open pit area is one of 15 exploration target zones at Empire identified from historical drilling by previous operators and more recent exploration conducted by Coast Copper.

Empire also includes a target zone at the historical Benson Lake Mine/Old Sport Horizon with copper and gold potential covering approximately 3 square kilometers ("km2") based on historical exploration and mining completed by Cominco Resources. To note, the 2023 MRE does not include the historical Benson Lake Mine reserves.