Barksdale Continues to Delineate the Copper Porphyry System at Sunnyside, and Provides a Drilling and Results Update - Connecting the Upper and Lower Porphyry

Vancouver, British Columbia--(Newsfile Corp. - July 20, 2026) - Barksdale Resources Corp. (TSXV: BRO) (OTCQB: BRKCF) (FSE: 2NZ) ("Barksdale" or the "Company") is pleased to provide an update on the 2026 reverse circulation drill program and results along with an integrated exploration update on its flagship Sunnyside copper-gold-silver project in the Patagonia Mountains of Southern Arizona.

The Company is currently drilling SUN26-023R and is less than 1,500 feet from completing the 25,000 feet footage requirement to increase ownership of the Sunnyside Project to 67.5%. The Company expects to finish the program by the end of July. The Company has received the assay results from an additional 10 holes of its 2026 reverse circulation drilling program at Sunnyside; results are listed in Table 1.

Following the strong results from SUN26-001R through SUN26-004R, the Company continued to utilize the pre-planned, United States Forest Service-approved drill sites to test for shallow hypogene copper extensions to the northeast, northwest, east-southeast, and to the southeast of these holes, where drilling is currently underway (Figure 1). Most sites are located approximately 600 to 650 metres laterally from the initial drill pad used for SUN26-001R through SUN26-004R. As such, these large step-outs were not intended to replicate the exceptional grades of SUN26-001R through SUN26-004R.

The newly released results indicate that copper grades decrease to the east, transitioning into a zone of lower copper and higher zinc grades, which may suggest movement away from the high-grade copper-mineralized shell. Holes drilled to the northwest show declining copper grades with increasing silver, lead, zinc, and manganese credits, suggesting this area may reflect higher heat flow. (please see Table 1 for results and Figure 1 for location). Holes SUN26-017R to SUN26-021R drilled 400m to the southeast of holes 001R to 004R are still awaiting assays. Hole 021R was lost at 810 ft and was redrilled as 022R to the 1,100 ft target depth. Holes SUN26-022R to SUN26-024R are currently being drilled and are located over 600m south/southeast of the initial four high-grade copper intercepts. These holes include one vertical and two angle holes also pointed toward the four high grade intercepts.

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