Mr. Rob Birmingham reports

GOLDHAVEN ADVANCES PORPHYRY COPPER TARGET AT THREE GUARDSMEN

Goldhaven Resources Corp. has successfully completed its 2026 induced polarization (IP) geophysical survey and geological field program at its 100-per-cent-owned Three Guardsmen project in southwestern Yukon.

The program represents another important milestone in Goldhaven's systematic exploration of an emerging porphyry copper system and was specifically designed to identify the potential intrusive source believed to have generated the magnetite-copper skarn, previously identified across the property.

Highlights

• Advances Goldhaven's emerging porphyry copper target following previously reported high-grade copper samples of up to 15.85 per cent Cu (copper);
• Completed approximately 3.9 kilometres of targeted induced polarization (IP) surveying designed to identify the potential intrusive source of previously identified magnetite-copper skarn mineralization;
• Geological mapping identified a broad oxidized gossan zone associated with altered intrusive rocks, further supporting the company's evolving geological interpretation;
• Geophysical inversion and interpretation are under way, with results to be integrated into the company's drill targeting strategy.

The program follows Goldhaven's successful 2025 exploration campaign, during which the company identified numerous high-grade magnetite-copper skarn occurrences, including grab samples grading 15.85 per cent copper, 12.75 per cent copper and 12.65 per cent copper, with 25 grab samples returning greater than 1 per cent copper.

CEO commentary

"Three Guardsmen continues to strengthen our confidence that we are vectoring toward a much larger mineralized system than originally recognized," commented Rob Birmingham, president and chief executive officer of Goldhaven. "This year's program was specifically designed to identify the intrusive source that may have generated the previously identified magnetite-copper skarn mineralization. The completion of this work, combined with encouraging geological observations in the field, provides another important dataset as we continue advancing one of our most prospective copper projects."

Targeting the source of the copper system

The program consisted of approximately 3.9 kilometres of induced polarization surveying completed over three strategically positioned survey lines designed to test the company's interpretation of a northwest-trending mineralized corridor. The survey was planned to evaluate whether previously identified high-grade copper-bearing skarn mineralization is associated with a larger concealed intrusive system.

Concurrent geological mapping focused on identifying hydrothermal alteration, intrusive relationships and structural controls capable of vectoring toward the centre of the mineralizing system.

The 2026 field program was completed between July 6 and July 17 utilizing helicopter-supported exploration crews, with helicopter services provided by Capital Helicopters, enabling efficient access to remote target areas across the property.

During the program, the geological team documented widespread alteration within granitic host rocks and adjacent magnetite-bearing copper skarn occurrences. Visible sulphide mineralization observed in the field included pyrite, chalcopyrite, pyrrhotite and locally molybdenite, further supporting the interpreted porphyry-skarn exploration model. The presence of magnetite-rich copper skarn mineralization is considered particularly encouraging, as this style of mineralization is commonly associated with calc-alkaline porphyry systems and occurs in significant British Columbia copper districts, including the Island Copper district. While no inference is made that mineralization at Three Guardsmen is comparable in size, grade or economic significance, these geological characteristics further support the company's exploration model targeting a concealed porphyry source.

The field team also identified a broad oxidized gossan exposure within the southeastern portion of the target valley. The gossan appears spatially associated with altered intrusive rocks and further supports the company's interpretation of a northwest-trending mineralized corridor. Portions of this target remained inaccessible due to persistent seasonal snow cover, limiting direct examination and making the area a priority target for future exploration.

Next steps

The completed geophysical data set has been submitted for processing and three-dimensional inversion.

Upon completion, Goldhaven will integrate the interpreted geophysical results with geological mapping, geochemistry and structural data to identify chargeability and resistivity anomalies that may represent priority drill targets.

The company expects the interpreted geophysical results will further refine its understanding of the Three Guardsmen mineral system and assist in prioritizing future drilling and follow-up exploration.

About the Three Guardsmen project

The Three Guardsmen project comprises approximately 16,234 hectares in southwestern Yukon and is prospective for copper-gold skarn and porphyry-style mineralization. Exploration completed to date has identified numerous copper-bearing skarn occurrences distributed across the property.

Goldhaven believes these mineralized occurrences may represent the distal expression of a larger mineralizing system concealed beneath the project area.

Historical sampling QA/QC (quality assurance/quality control)

The historical rock sample results referenced in this news release were previously disclosed in the company's news release dated Dec. 9, 2025. Details regarding sampling procedures, quality assurance and quality control protocols, analytical methods, laboratory information and qualified person disclosure are contained in that news release.

Cautionary statement regarding grab samples

The historical grab sample results referenced in this news release are selective in nature and may not be representative of the mineralization present on the property. Readers are cautioned not to place undue reliance on grab sample results.

Qualified person

The scientific and technical information contained in this news release has been reviewed and approved by Raymond Wladichuk, PGeo, a non-independent qualified person as defined by National Instrument 43-101 and a consultant to the company.

About Goldhaven Resources Corp.

Goldhaven Resources is a Canadian junior exploration company focused on advancing highly prospective mineral projects in North and South America. The company's flagship asset is the district-scale Magno project in the Cassiar district of Northern British Columbia. Goldhaven also owns the Three Guardsmen copper-gold project in British Columbia and the Copecal gold project in Mato Grosso, Brazil. In addition, the company holds a portfolio of critical mineral projects in Brazil.

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