Mr. Rob Birmingham reports

GOLDHAVEN FILES NI 43-101 TECHNICAL REPORT FOR THE DISTRICT-SCALE MAGNO POLYMETALLIC PROJECT, CASSIAR DISTRICT, BRITISH COLUMBIA

Goldhaven Resources Corp. has filed an independent technical report prepared in accordance with National Instrument 43-101 -- Standards of Disclosure for Mineral projects. The technical report, titled "Magno project, Liard Mining Division, BC," can be found on the company's website and under the company's issuer profile at SEDAR+.

Rob Birmingham, president and chief executive officer of Goldhaven Resources, commented:

"The filing of the Magno NI 43-101 technical report represents an important step in advancing one of the most prospective polymetallic projects in the Cassiar district. Our recent exploration results, including exceptional silver-lead-zinc grades and significant indium enrichment, highlight the district-scale potential of the property. With our flow-through financing under way, the company is focused on advancing permitting and preparing for drilling to unlock the full value of the Magno project."

Magno project highlights (excerpt from the 43-101 technical report)

• High-grade silver-gold-zinc-lead results* -- Grab samples returned up to less than 25 grams per tonne gold, 2,370 g/t silver, less than 20 per cent lead and 19.25 per cent zinc from the Magno and D zones. Notably, 45 of 357 samples exceeded 100 g/t Ag, confirming widespread high-grade mineralization.

• 334 parts per million indium discovery confirms critical mineral potential -- Indium values up to 334 ppm associated with sphalerite (Zn), representing the highest recorded in the Cassiar district and highlighting Magno's strategic relevance amid tightening global indium supply.

• Strong and widespread tungsten mineralization -- 32 samples returned greater than 1,000 ppm tungsten, including a peak of 6,550 ppm W at Vines Lake, with consistent 500 to 5,000 ppm W values at Kuhn and Dead Goat, supporting the presence of a robust tungsten-skarn system.

• Fully funded advancement strategy -- The planned $2.0-million flow-through financing supports 2026 3-D modelling, target refinement, drill planning and continued verification of historical showings while expanding newly identified district-scale targets.

*Grab samples are selective by nature and may not represent average grades of mineralization

Magno project overview

Goldhaven's Magno project is a district-scale polymetallic exploration asset spanning over 37,000 hectares in the prolific Cassiar region of northwestern British Columbia. The project hosts a large intrusion-related hydrothermal system including copper-gold, silver-lead-zinc, tungsten-skarn and critical-mineral mineralization.

Property-wide geological mapping, sampling and geochemical analysis define a classic porphyry-related metal zonation pattern, supporting interpretation of a large mineralizing system with stacked deposit environments and strong structural controls.

Flow-through financing:

Goldhaven is currently advancing a non-brokered flow-through private placement of up to $2-million through the issuance of flow-through common shares priced at 26.5 cents per share. Proceeds from the financing will be used to incur eligible Canadian exploration expenses at the Magno project, including permitting, drill targeting and advancement of high-priority mineralized zones identified during the company's 2025 exploration program. The company may pay finders' fees in accordance with applicable securities laws and exchange policies.

Next steps

the company is currently advancing drill targeting and permitting in preparation for a planned 2026 drill program at the Magno project. The program is designed to test multiple high-priority mineralized targets, including silver-lead-zinc carbonate replacement (CRD) systems, copper mineralization and tungsten-bearing skarn zones, identified through historical exploration and the company's recent field programs.

Goldhaven is leveraging its growing geological, geochemical and structural database to refine drill targets and evaluate the district-scale polymetallic and critical minerals potential of the Magno project.

Planned work includes

• Refinement of 3-D geological and metal zonation models to better understand mineralizing controls;

• Integrated interpretation of structural, geochemical and geophysical datasets;

• Prioritization of porphyry, CRD Ag-Pb-Zn, tungsten-skarn and critical mineral targets;

• Development of high-confidence drill targets across priority zones;

• Advancement of permitting and logistical preparation for an initial drill program.

The 2026 exploration program is designed to test the scale, vertical extent and higher-grade vectors of the Magno mineralizing system across several target areas within the property. the company believes Magno has the potential to host a large polymetallic system comparable to other mineralized districts within the Cassiar region.

About Goldhaven Resources Corp.

Goldhaven Resources is a Canadian junior exploration company focused on acquiring and exploring highly prospective land packages in North and South America.

Qualified person

The technical and scientific information contained in this news release has been reviewed and approved by Lindsay Bottomer, PGeo, who is an independent qualified person as defined under NI 43-101 and a consultant of the company. Raymond Wladichuk, PGeo, a qualified person as defined under NI 43-101, has also reviewed the technical and scientific material contained in this news release.

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