Myriad Uranium releases radiometric results from Lucky Cliff

Vancouver, British Columbia--(Newsfile Corp. - August 20, 2026) - Myriad Uranium Corp. (CSE: M) (OTCQB: MYRUF) (FSE: C3Q) ("Myriad" or the "Company") is pleased to announce preliminary gamma probe equivalent uranium results from drilling at Lucky Cliff, Copper Mountain (see Figure 1). These estimates are not chemical assays and remain subject to laboratory verification.

Highlights

Myriad's current Phase II drill program is designed to achieve two primary objectives:

Verify mineralization that underpins a historical resource estimate 1 of 26.63 Mlbs eU₃O₈ and generate modern data to support a future maiden mineral resource estimate.

Evaluate exploration upside by testing historical targets identified through drilling in the 1970s and assessing new targets generated by Myriad's own exploration work, that could deliver an exploration target 2 of between 245 and 655 Mlbs eU₃O₈ .

Myriad has now completed four drill holes at Lucky Cliff for a total of 716.6 metres (2,351 feet) of drilling.

All four holes intersected numerous broad intervals of near-surface uranium mineralization.

Across the four holes, 50 mineralized intervals exceed 100 ppm eU₃O₈.

The longest mineralized interval is 19.96 metres (65.49 feet) at 269 ppm eU₃O₈ from 18 m .

The highest grade intercepted is 1,336 ppm eU₃O₈ .

Because Lucky Cliff lies outside any area with a historical resource or endowment estimate, any mineral resource that may in future be defined there would be new and incremental to the Copper Mountain Uranium Project mineral endowment , if supported by sufficient exploration and estimation work.

Best Intervals Above 100 ppm eU₃O₈ Threshold

¹ GT (m%) = grade-thickness product (interval length in metres multiplied by grade in %), a standard metric for comparing the relative scale of mineralized intercepts.

Equivalent uranium (eU₃O₈) grades are radiometric estimates derive