Copper Fox Announces Porphyry Copper Discovery and Strong Vectors Toward Core at Mineral Mountain

Calgary, Alberta--(Newsfile Corp. - June 11, 2026) - Copper Fox Metals Inc. (TSXV: CUU) (OTCQX: CPFXF) (FSE: HPU) ("Copper Fox" or the "Company") and its wholly owned subsidiary, Desert Fox Mineral Mountain Co. ("Desert Fox"), are pleased to report preliminary results from diamond drillhole (DDH) MM-02-2025 at its 100% owned Mineral Mountain porphyry copper project in Arizona. DDH MM-02-2025 has confirmed the presence of a large, evolved porphyry copper-molybdenum system and intersected the outer portion of a mineralized copper shell, with multiple geological indicators suggesting increasing mineralization at depth and proximity to the core of the system. DDH MM-01-2025 intersected the "shoulder" of the system approximately 1.3 kilometers (km) southwest of DDH MM-02-2025.

Elmer B. Stewart, President and CEO of Copper Fox, stated, "DDH MM-02-2025 intersected a classic porphyry alteration and mineralization sequence and indicates vectoring toward a potential higher-grade potassic core below that marks an important advance in our understanding of the Mineral Mountain porphyry copper system. The distribution and increase in copper-molybdenum mineralization, quartz veining, high-temperature alteration minerals, magnetite sulphidization and appearance of bornite rimming chalcopyrite at depth indicate that drilling has not yet reached the core of this large porphyry system. Intersecting the outer, lower grade part of the copper shell, together with increased molybdenum values provides clear targets for follow-up drilling and supports our view that higher-grade mineralization may lie below the current drill depth."

Highlights

• Porphyry copper system confirmed, with multi-phase alteration and mineralization.
• DDH MM-02-2025 intersected the outer copper shell, with grades increasing downhole.
• Strong vectoring indicators toward a higher-grade core at depth.
• Significant quartz-sulphide veining and sulphide content increase with depth.
• Copper-molybdenum mineralization hosted in quartz veins, fractures, and disseminations in vein alteration envelopes.
• DDH MM-02-2025 terminated early at 1,697.35 meters (m) due to drilling conditions, leaving system open at depth.
• Located six mineral claims to cover extension of recently identified porphyry copper target.

The Mineral Mountain project is located in a prolific Laramide-age porphyry copper belt in Arizona, approximately 25km southwest of Rio Tinto and BHP's giant Resolution porphyry copper-molybdenum deposit and approximately 20km northeast of the recently commissioned Florence ISCR copper mine reinforces the porphyry potential of the property (Figure-1).

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