Mr. Rob Birmingham reports

GOLDHAVEN CONFIRMS GOLD MINERALIZATION IN BEDROCK AT COPECAL WEST TARGET, INCLUDING 39M OF MINERALIZATION IN FIRST-EVER DRILLING

Goldhaven Resources Corp. has released results from four diamond drill holes -- COPE-PDH-005, COPE-PDH-006, COPE-PDH-007 and COPE-PDH-008 -- representing the first-ever drilling completed on the company's high-priority West gold-in-soil target at the Copecal gold project in Mato Grosso, Brazil. Most significantly, hole COPE-PDH-008 has confirmed gold mineralization in unweathered bedrock beneath a deep saprolite weathering profile, validating the geological model that the company's robust six-kilometre surface geochemical anomaly is underlain by an in situ hydrothermal gold system.

Highlights:

• Key bedrock result -- COPE-PDH-008 (leads):
  • 39.0 metres at 0.11 gram per tonne gold from 58.0 m in unweathered granodiorite-gneiss -- first-ever confirmation of in situ bedrock gold at the West target, including 3.0 m at 0.30 g/t Au;
  • 1.0 m at 1.69 g/t Au from 1.0 m in the same hole (near-surface saprolite) -- high-grade structural shoot present to surface;
  • Sheeted quartz veining and structural deformation logged throughout the fresh rock interval -- consistent with intrusion-related gold architecture of the Juruena province;
• Program overview:
  • Gold mineralization intersected in all four West target holes; values substantially exceed local background across all intercepts;
  • Enhanced saprolite thickness (approximately 60 m) at West target may reflect preferential weathering of altered/structurally impacted zones related to underlying mineralization;
  • Bedrock confirmation resolves the key geological question at West Target: the six-kilometre surface anomaly is sourced from an in situ hydrothermal gold system;
  • Physical property testing of drill core and integrated induced polarization/resistivity geophysics to directly inform orientation and targeting of follow-up drill holes;
  • Note: drilled widths; true widths not known.

The program intersected geologically meaningful gold enrichment, with assay values substantially exceeding local background levels. The anomalous results confirm system fertility and enhance the prospectivity of the project, although additional work is required to determine continuity, grade distribution and potential economic significance.

These results confirm the presence of anomalous gold mineralization across all holes drilled to date into the West target and importantly demonstrate gold anomalism within unweathered bedrock for the first time at Copecal.

Jon Hill, Goldhaven's country manager in Brazil and AngloGold Ashanti's former exploration manager, commented: "Prior to this program, all gold mineralization at the West target had been confined to saprolite. A key exploration question was whether mineralization extends into underlying bedrock. Hole PDH-008 provides the first evidence that it does, intersecting sheeted quartz veining within granodiorite-gneiss at 58 metres with anomalous gold. This is a meaningful technical milestone that enhances our understanding of the mineralizing system and supports continued drilling."

Significant drill results

Significant results from the four diamond holes drilled at the West target in Q4 2025 are summarized in Table 1 below. Hole COPE-PDH-008 is presented first as the material bedrock confirmation result. All intervals are reported as downhole lengths; true widths are not yet known. A reporting cut-off of 0.10 g/t Au has been applied with a minimum 1.0 m interval width.

Geological context

Regional setting -- Juruena gold province

The Copecal project is situated within the Juruena gold province (also known as the Juruena magmatic arc), a Paleoproterozoic orogenic belt recognized for hosting multiple gold deposit styles, including mesothermal shear-related deposits, intrusion-related gold systems, porphyry-style mineralization and epithermal occurrences. The company's tenements cover 3,681 hectares in a geologically favourable setting within this historically productive mineral province, which hosts G-Mining's Tocantinzinho deposit -- recently commissioned as a commercial gold producer -- as well as porphyry-style (Serabi and Jaca) and epithermal-style (X1 and Aura) occurrences.

Mineralization within the region is commonly associated with: (i) structurally controlled hydrothermal systems; (ii) quartz veining and phyllic alteration; and (iii) sulphide assemblages that may include pyrite, chalcopyrite and locally bornite. These regional characteristics inform the continuing interpretation of the alteration and structural assemblages observed at Copecal.

West target

Sheeted quartz vein systems hosted in granodiorite-gneiss represent the dominant gold-bearing architecture in the Juruena gold province, where structurally controlled vein stockworks have been identified as the primary mineralizing environment across multiple producing and development-stage deposits in the region. The intersection of this lithological and structural assemblage in unweathered bedrock at Copecal West is consistent with the company's geological model for an intrusion-related gold system at depth.

The presence of narrow high-grade intervals (1.21 g/t, 1.04 g/t and 1.69 g/t Au over one m) within broader anomalous envelopes across three separate holes is consistent with structurally controlled gold shoots of the type that define economic ore shoots in sheeted vein systems across the province. Follow-up drilling will be designed to intersect these structural targets directly, guided by integrated geophysical and alteration data.

Drill holes COPE-PDH-005 through COPE-PDH-008 encountered a substantially thicker saprolite weathering profile than the East target holes, extending to approximately 60 m downhole. While no visible sulphides were observed in fresh core, the following features were systematically logged in the granodiorite-gneiss host rock in COPE-PDH-008:

• Sheeted quartz veins and veinlets in granodiorite-gneiss, tentatively interpreted as a sheeted vein system consistent with intrusion-proximal gold mineralizing environments in the Juruena province;
• Shearing, folding and phyllic alteration throughout the bedrock interval;
• Structural deformation features consistent with a hydrothermal conduit system.

The company further notes that the enhanced saprolite thickness at the West target may reflect preferential weathering of altered and/or structurally impacted zones associated with potential underlying mineralization. This observation is being integrated into the geophysical targeting program for follow-up drilling.

Next steps

The company has identified the following integrated work program to advance Copecal West toward systematic resource-stage exploration:

• Physical property measurements (density, resistivity and chargeability) on drill core from all nine holes in the inaugural program to calibrate historical IP/resistivity geophysical data sets against drill-confirmed mineralized intervals; this will directly inform the orientation and targeting of follow-up holes designed to intersect structural targets identified by the geophysical response at depth;
• Comprehensive multielement geochemical data review and detailed alteration characterization across all West Target holes, to define mineralization vectors and refine the structural model;
• Review of structural controls and foliation orientations logged in COPE-PDH-008 fresh core to determine optimal drill azimuth and inclination for targeting sheeted vein shoots;
• Integration of AngloGold Ashanti historical data sets (auger/air-core drilling, geophysical surveys, soil geochemistry, 2010 to 2016) with new drill core data to define priority follow-up drill corridors within the six-kilometre anomaly;
• Pending East target sulphide assay results from COPE-PDH-004 and COPE-PDH-009 will be considered alongside the West target bedrock confirmation in planning the next drill phase.

Rob Birmingham, chief executive officer of Goldhaven Resources, commented: "These latest drill results represent a major milestone for the Copecal project," stated Rob Birmingham, chief executive officer of Goldhaven Resources. "For the first time, we have confirmed gold anomalism in fresh bedrock beneath the thick saprolite profile that previously masked the system. Importantly, these are the first holes ever drilled at the Western target, and the results provide strong confidence that the robust surface geochemical anomaly is sourced from an underlying mineralized system. We are highly encouraged by the emerging geological picture and can now plan follow-up drilling aimed at vectoring toward the core of what we believe could be a large and significant gold system."

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 and 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: the Bahia South, Bahia North and Igautu projects, located in Brazil.

Qualified person

The scientific and technical information in this news release has been reviewed and approved by Jonathan Victor Hill, BSc (honours), FAusIMM, a qualified person as defined by National Instrument 43-101 and country manager of Goldhaven Resources. Mr. Hill is not independent of the company.

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