Mr. Rob Birmingham reports

GOLDHAVEN LAUNCHES DISTRICT-SCALE AIRBORNE SURVEY AT MAGNO TO SUPPORT 2026 DRILLING

Goldhaven Resources Corp. has engaged Dias Airborne Ltd. to complete a 1,741-line-kilometre high-resolution airborne magnetic survey across its 100-per-cent-owned Magno project in the Cassiar district of Nrthern British Columbia.

The survey is expected to commence in June 2026, with an anticipated 14-day duration, and will be flown at 100 metre line spacing over the company's priority target corridors, highlighting the Magno Zone, Kuhn Zone, and D Zone. This marks the first modern geophysical survey completed over the consolidated Magno land package.

Highlights

• Dias engaged to complete 1,741-line-kilometre high-resolution airborne magnetic survey;
• Survey targeted to commence June 2026, with a 14-day anticipated duration;
• High definition 100 metre line spacing across priority corridors including Magno, Kuhn and D zones;
• Dias's QMAGT platform is the same advanced geophysical system successfully used at the Hercules Metals Corp. Leviathan discovery (2023);
• Program designed to support 2026 drill targeting and 3-D geological modelling;
• Potential follow-on ground-based 3-D IP survey under evaluation;
• Funded through recently completed critical minerals flow-through financing.

The airborne program is designed to capture the package of north-south-striking sedimentary rocks in contact with the intrusive granitic rocks to the west. These rock packages and contact zones host a mineralized corridor containing numerous mineralized showings and occurrences including: skarn mineralization, carbonate replacement deposit (CRD) type mineralization and porphyry style mineralization.

Goldhaven selected Dias based on the strong geological analogy between Magno's near-surface CRD and adjacent porphyry-style mineralization and the geophysical success achieved at Hercules Metals' Leviathan discovery in Idaho.

The airborne survey is designed to strengthen Goldhaven's understanding of the project's structural architecture, intrusive contacts and alteration corridors across multiple prospective mineralized systems. The resulting high-resolution data set will be integrated into the company's evolving 3-D geological model, which combines newly generated data with extensive historical exploration records to refine and prioritize 2026 drill targets.

The company is also evaluating a potential follow-on ground-based 3-D IP survey to further enhance subsurface targeting in advance of drill mobilization.

Recent 2025 surface work has identified multiple high-priority corridors supported by strong silver-lead-zinc and tungsten-indium mineralization, including silver values up to 2,370 grams per tonne, tungsten up to 6,550 parts per million and indium values up to 334 ppm. These mineralized surface expressions are being used directly to guide airborne survey design and target prioritization.

CEO commentary

"This survey represents a major step forward in systematically unlocking the district-scale potential of Magno," stated Rob Birmingham, chief executive officer of Goldhaven. "By integrating modern high-resolution geophysics with our growing geological database and 2025 surface discoveries, we believe we are significantly improving our ability to define high-confidence drill targets across multiple mineralized systems at Magno."

About Dias and QMAGT technology

Dias Airborne is a recognized leader in advanced geophysical survey technologies for mineral exploration. The survey will utilize Dias's proprietary QMAGT (quantum magnetic gradiometry tensor) system, a helicopter-borne platform that measures the full tensor of the Earth's magnetic field using SQUID (superconducting quantum interference device) sensors.

This technology provides enhanced resolution and directional data compared with conventional magnetic surveys, enabling more precise detection and modelling of subsurface geological features. The system's sensitivity and ability to operate in diverse environments make it particularly effective for early-stage exploration and target delineation.

Dias's advanced geophysical technologies have been successfully applied in modern mineral exploration programs, including at the Hercules project, where high-resolution geophysical data sets played an important role in refining concealed drill targets that ultimately led to discovery success. Goldhaven believes deploying comparable next-generation geophysical techniques at Magno has the potential to materially enhance target definition across multiple high-priority corridors and accelerate the company's path toward drill-ready discovery targets.

Qualified person

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