Mr. John Mirko reports

ROKMASTER COMMENCES IP SURVEY AT MYSTERY TO REFINE PORPHYRY TARGETS

Rokmaster Resources Corp. has provided an update on exploration activities within the Nechako project.

Crews will soon mobilize to complete a detailed induced polarization survey over several porphyry copper-(molybdenum plus or minus gold) targets on the Mystery property. This survey will sharpen targets planned for drill testing during the fall. The IP survey will be conducted by SJ Geophysics and is planned to be a pole-dipole active array capable of investigating chargeability and resistivity to depths of 300 to 400 metres.

The current targets include the B2 and B3 zones, which exhibit elevated copper, molybdenum and gold in rock sample results associated with strongly potassic-altered andesite hosting a dense stockwork of pyrite-chalcopyrite-biotite-magnetite veinlets. The B2 zone is exposed along a creek for approximately 200 metres. The surrounding area, including approximately 800 metres toward the B3 zone, is covered by glacial till so the IP survey will greatly assist in planning specific drill targets in this area.

Approximately 2.5 kilometres to the northeast, an IP survey is planned to investigate a coincident soil and magnetic anomaly in the northern portion of the Ford anomaly area. This area is underlain by rhyolite belonging to the Kasalka group, which displays strong phyllic alteration over a broad area, including intense sericite replacement and disseminated pyrite. Hyperspectral work completed in the previous years indicates that higher-temperature paragonite occurs below a certain elevation in the Ford anomaly area, inferring that potential exists at depth.

Another approximately 1.1 kilometres to the north of the Ford anomaly, the planned IP survey will test an area of stockwork quartz veining in sericite- and potassic-altered porphyritic monzonite. A rhenium-osmium (Re-Os) age dating study of molybdenite mineralization in this area indicates that it falls within the range of the productive late Cretaceous Bulkley intrusive suite, which is related to porphyry systems in the region such as the Huckleberry, Ox, Seel and Poplar deposits.

Fieldwork on the Fox-Coconut property is planned for early June to further explore the high-grade gold and silver mineralization on that property. Geochemical results from the drill program completed on the Hanson property in April, 2026, are expected soon and will be reported promptly afterward.

John Mirko, president and chief executive officer, commented: "The IP survey planned for the Mystery property will capture valuable subsurface geophysical data to refine several compelling targets on the property. We are excited to continue advancing the Nechako project throughout 2026 and are fully funded to complete the programs as currently planned. This region and its underlying geology represent an exceptional setting for the discovery of significant porphyry copper mineralization -- an opportunity that Rokmaster is actively pursuing."

Nechako project

The Mystery property is a part of the company's Nechako project, which totals 26,704 hectares (267 square kilometres) across three properties located in west-central British Columbia. The Nechako project features multiple exploration targets for significant porphyry copper-(molybdenum plus or minus gold) mineralization and high-grade gold-silver vein systems in the southern portion of the productive Stikine terrane. Rokmaster has advanced the Nechako project over several years, systematically vectoring toward robust drill targets across its three drill-permitted properties.

The technical information in this news release has been prepared in accordance with Canadian regulatory requirements as set out in National Instrument 43-101 and reviewed and approved by Eric Titley, PGeo, who is independent of Rokmaster and who acts as Rokmaster's qualified person.

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