Mr. Rob Birmingham reports

GOLDHAVEN ANNOUNCES PHASE II DRILL PROGRAM AT COPECAL AS INDEPENDENT REVIEW IDENTIFIES MULTIPLE MINERALIZATION VECTORS

Goldhaven Resources Corp. is planning for a phase II diamond drilling program at its Copecal gold project in Brazil following a positive independent geological review of the company's maiden drill campaign and exploration model.

The independent review validated key components of Goldhaven's exploration thesis and confirmed the presence of a large-scale hydrothermal system with intrusive-related gold and base metal mineralization potential. The review identified multiple vectors toward potentially more prospective portions of the system including sulphide zonation, widespread hydrothermal alteration, structural controls and indications of increasing temperature toward the core of the system.

Highlights

• Independent geological review validates Goldhaven's exploration model at Copecal;
• Phase II diamond drilling program planned for approximately 1,200 metres;
• Multiple geological vectors identified toward potentially stronger mineralization at depth and along strike;
• East target exhibits zoned chalcopyrite-bornite sulphide mineralization associated with increasing temperature vectors;
• Untested core of the West target gold-in-soil anomaly identified as a high-priority drill target;
• Historical work by AngloGold Ashanti outlined an approximately six-kilometre gold-in-soil anomaly across the project area;
• Recently announced LIFE financing provides flexibility to potentially expand exploration activities across the company's project portfolio.

Based on these conclusions, Goldhaven is planning a follow-up, stepout diamond drilling program consisting of approximately five to six drill holes totalling approximately 1,200 metres. The phase II program is designed to test high-priority targets at depth and along strike at both the east and west targets, where geological, structural and geochemical indicators suggest proximity to a potentially more robust mineralized system.

The combination of sulphide zonation, intrusive-related alteration, structural controls and untested geophysical targets supports Goldhaven's interpretation that Copecal may represent a larger hydrothermal mineralized system with potential for stronger mineralization at depth and along strike.

The company's recently announced LIFE financing is expected to provide additional flexibility to evaluate expanded exploration activities across Goldhaven's portfolio, including potential follow-up drilling at Copecal and the company's flagship Magno project in British Columbia.

"We are very encouraged by the conclusions of the independent geological review, which reinforces our belief that Copecal hosts a large-scale hydrothermal system with strong structural and intrusive-related mineralization potential," stated Rob Birmingham, chief executive officer of Goldhaven. "The identification of multiple geological vectors, including sulphide zonation, hydrothermal alteration and structural controls, provides a compelling framework for our next phase of drilling as we continue advancing this highly prospective gold project in Brazil."

East target -- mineral zonation and vectoring

At the east target, the consultant confirmed:

• A northerly dipping, shear-hosted mineralized zone;
• Distinct zoned sulphide assemblages:
  • Chalcopyrite-pyrite;
  • Chalcopyrite-bornite, suggesting increasing temperature and providing a temperature vector.
• Elevated magnetic susceptibility in the core of the system.

These features represent a clear vector toward potentially stronger mineralization, both at depth and along strike.

West target -- structural control and gold enrichment

At the west target, key features identified:

• Higher-grade gold enrichment associated with asymmetric to isoclinal fold structures;
• Dense-sheeted quartz veinlet systems hosted within phyllic altered meta-granodiorite;
• Potassic alteration, evidenced by crystalline biotite along vein margins within wide intervals indicating potential for a robust hydrothermal system along strike to the west and at depth.

Importantly:

• The core of the west target gold-in-soil anomaly remains largely untested and represents a high-priority drill target;
• This anomaly aligns with a fold hinge and closure zone interpreted from drone magnetic data.

The company continues to advance Copecal through a multidisciplinary exploration approach that integrates modern geological interpretation with historical data sets generated by prior operators, including AngloGold Ashanti. This approach combines historical drilling, geochemical and geophysical information with recent field mapping, soil sampling, and diamond drilling results to enhance targeting and improve vectoring toward potentially mineralized centres.

The second phase drilling program is currently planned to commence during the second quarter of 2026, subject to final logistical planning and contractor availability.

Further updates regarding drill targeting, mobilization timelines and exploration activities at the Copecal project will be provided as they become available.

About the Copecal gold project: a brief history

The Copecal gold project is strategically situated within the Alta Floresta gold province, a historically productive region that has yielded substantial gold discoveries since the late 1970s. Goldhaven's tenements cover a total of 3,681 hectares in a geologically favourable setting within the Juruena gold province of Brazil.

The Juruena gold province, also known as the Juruena Magmatic Arc, is an orogenic belt highly prospective for mesothermal shear-related and intrusion-related gold deposits, such as G-Mining's Tocantinzinho deposit. Additionally, the region hosts recently identified porphyry-style deposits (for example, Serabi and Jaca) and epithermal-style deposits (for example, X1 and Aura). The presence of multiple deposit styles, along with the confirmation of large-scale gold deposits in the Juruena province of Brazil, underscores the significant potential of the Copecal gold project.

Recent exploration programs, including geochemical soil sampling, drone-mounted magnetometry surveys and historical drilling data, indicate the presence of multiple gold-bearing structures. Notably, AngloGold Ashanti previously conducted systematic exploration on the property from 2010 to 2016, including auger and air-core drilling, geophysical surveys, and rock geochemistry, identifying multiple zones of anomalous gold mineralization.

The Copecal gold project benefits from extensive historical work, with AngloGold Ashanti's exploration confirming gold and arsenic anomalies, indicative of significant mineralization potential. Soil sampling grids and follow-up auger drilling in key areas revealed consistent gold values over wide zones, further supporting the presence of a substantial mineralized system.

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. 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 Igautu projects located in Brazil.

Qualified person

The scientific and technical information disclosed in this document has been reviewed and approved by Jonathan Victor Hill, BSc, Hons, FAusIMM, a non-independent qualified person consistent with National Instrument 43-101 and country manager of Goldhaven.

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