Mr. Rob Birmingham reports

GOLDHAVEN RESOURCES CONFIRMS HIGH-GRADE COPPER MINERALIZATION AT THREE GUARDSMEN PROJECT

Assay results from the Three Guardsmen property have confirmed the presence of high-grade surface copper mineralization on Goldhaven Resources Corp.'s 100-per-cent-owned property located in Northern British Columbia.

Highlights:

• 126 surface rock samples collected, including 25 samples exceeding 10,000 parts per million (1 per cent copper);
• High-grade grab samples, including:
  • J647161 (15.85 per cent Cu);
  • J647629 (12.75 per cent Cu);
  • J647753 (12.65 per cent Cu).

(Note -- grab sample grades are not indicative of expected overall grades.)

• The Three Guardsmen project hosts high-grade copper mineralization in epidote-magnetite skarns, with extensive malachite-stained pods traced over more than one kilometre of strike.
• Porphyritic intrusive textures with associated elevated copper and molybdenum values have been identified at low elevations in the valley bottom, possibly indicative of an intrusive source for the skarn mineralization.
• Geochemical transitions across the property (copper-silver to bismuth-tellurium-gold to molybdenum) suggest a vector toward an intrusive heat source underlying the skarn system.

Three Guardsmen

The Three Guardsmen property comprises 14 contiguous mineral tenures covering 16,234 hectares within the Atlin mining division of northwestern British Columbia. The claims are 100 per cent owned by Goldhaven. Strategically located near Haines Junction, the Three Guardsmen project sits in a highly prospective geological area known for copper-magnetite skarns with associated gold and molybdenum mineralization. Observed transitions from copper- and silver-rich zones to bismuth-, tellurium- and gold-rich areas, along with molybdenum in altered granites suggest a possible nearby porphyry system.

The 2025 field program at Three Guardsmen concentrated on verifying historical high-grade copper samples located at the Canadian Verdee and Mildred showings as well as doing first-pass mapping and assessment on the property. Assay results validated historical sampling, returning new discoveries that include copper grades up to 15.85 per cent Cu (sample J647161). Of the 126 samples collected, 25 returned assays above 1 per cent Cu, confirming the widespread distribution of mineralization across the property.

Geological significance

At the Canadian Verdee, high-grade copper occurs in local pods dominated by bornite and chalcocite. These grade along strike into more extensive epidote-dominant skarn with magnetite-chalcopyrite mineralization and widespread malachite staining. These mineralized zones extend over a strike length of more than one kilometre, highlighting the scale and potential of the system. The team believes the skarn zones may extend from Canadian Verdee to Mildred for a total of 2.6 km of prospective strike length. Cliff side oxidization suggests this is likely although rugged terrain currently has prevented verification of this.

Importantly, the presence of altered granites carrying molybdenum -- along with systematic geochemical transitions from Cu-Ag zones into Bi-Te-Au enrichment -- suggests the presence of a nearby porphyry intrusion driving the metal system. The project lies within a late Cretaceous tectonic setting that hosts several world-class porphyry deposits, including Casino and Red Mountain, further underscoring the exploration potential.

Goldhaven's continuing exploration strategy includes targeted geochemical surveys, structural mapping and geophysical interpretation aimed at defining potential mineralized granitic intrusive centres.

Rob Birmingham, chief executive officer of Goldhaven Resources, commented: "These assays are a major milestone for Goldhaven. Discovering copper grades as high as 15.85 per cent at surface, along with widespread high-grade mineralization across the property, clearly shows the strength of the system at Three Guardsmen. This is the kind of early success that can redefine a company. With strong geological evidence pointing toward a nearby porphyry source, we believe the project offers exceptional upside as we continue to advance exploration."

Qualified person

The technical and scientific information contained in this news release has been reviewed and approved by Lindsay Bottomer, PGeo, who is a qualified person as defined under National Instrument 43-101, a consultant of the company.

About Goldhaven Resources Corp.

Goldhaven is a Canadian junior exploration company focused on acquiring and exploring highly prospective land packages in North and South America. The company's projects include: (i) the flagship Magno project, a district-scale polymetallic property adjacent to the historic Cassiar mining district in British Columbia; (ii) the Three Guardsman project, which exhibits significant potential for copper and gold-skarn mineralization; (iii) the Copecal gold project, a drill-ready gold project located in Mato Grosso, Brazil, with a six-kilometre strike of anomalous gold-in-soil samples; and (iv) three critical mineral projects with extensive tenement packages totalling 123,900 hectares: Bahia South, Bahia North and Iguatu projects located in Brazil.

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