Westhaven Announces the Start of Exploration at the Spences Bridge Gold Belt Properties, Southern British Columbia

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Assay intervals noted above represent downhole intersections, not true widths. True widths can be estimated at approximately 70-80% of the reported intervals. Table 1 shows assay results, including drill hole locations and orientations, and is also linked here.

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Figure 1 shows the locations of the drill holes reported in this news release, as well as the other holes completed in 2026, the planned 2026 drill collar locations and the drill collars of pre-2026 drilling of the South Zone.

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Figures 2 and 3 present South Zone cross-sections highlighting several high-grade drill intercepts. The sections are viewed to the northwest (310°) and illustrate strong continuity of mineralization hosted within structurally controlled quartz veins and hydrothermal breccia zones.

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Sampling, Laboratory Analyses and Quality Assurance/Quality Control (QA/QC)

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Most core samples consist of halved drill core cut by manual sawing using industry standard core saws. In rare cases, and where required by physical core conditions, manual splitting may be used. Half of the core is retained in the original core box for reference samples and any required future work, including QA/QC. Core samples, controlled by a unique bar-coded reference number, are delivered to ALS’s Kamloops facility and prepared using the PREP-31 package. Each core sample is crushed to better than 70% passing a 2mm (Tyler 9 mesh, US Std. No.10) screen. A split of 250g is taken and pulverized to better than 85% passing a 75-micron (Tyler 200 mesh, US Std. No. 200) screen.

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Further analytical and assay procedures are conducted in ALS’s North Vancouver facility. A 0.75g subsample of the pulverized split is subjected to four acid digestion and analyzed via ICP-MS (method code ME-MS61m (+Hg)) which reports a suite of 49 elements.

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All samples are also analyzed for gold by fire assay with an AES finish, method code Au-ICP21 (30g sample size) or Au-ICP22 (50g sample size). Samples returning gold values over 10ppm are subjected to over-limit check assays using fire assay and a gravimetric finish (method code Au-GRA21 and a 30g sample size, or Au-GRAV22 and a 50g sample size). The switch to 50g aliquots applies to 2026 resource infill drill holes starting at, and including, SNR26-98. Other over-limit elements may also be subjected to ore grade analyses which vary depending on the element of interest.

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ALS’s facilities are accredited to the ISO/IEC 17025 standard for gold assays, and all analytical methods include quality control materials at set frequencies with established data acceptance criteria.

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QA/QC incorporates the laboratory’s internal quality assurance controls as well as Westhaven’s field controls, including the insertion of quarter core duplicates, certified reference materials and blanks, each at a rate of roughly one per 20-25 core samples.
Additional blanks are inserted following samples with visible gold or significant concentrations of ginguro (fine grained bands of dark gray to black sulphides).

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QA/QC data are evaluated on receipt for failures, and appropriate action is taken if results for duplicates, standards and blanks fall outside allowed tolerances.

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Westhaven’s ongoing QA/QC programs are consistent with industry best practices and include auditing of all exploration data. Any significant changes will be reported when available.

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Figure 1 – Plan View Map July 2026

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Figure 2 – South Zone Cross Section A-A’

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Figure 3 – South Zone Cross Section B-B’

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Reported intervals are at least 2m in length with a 1 g/t Au cut-off for individual samples and no more than 3m contiguous metres dilution.
*Reported interval is less than 2.00m.

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Table 1 – Assay Highlights

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ABOUT WESTHAVEN GOLD CORP.

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Westhaven is a gold and silver focused exploration and development company targeting low sulphidation, high-grade, epithermal style gold and silver mineralization within the Spences Bridge Gold Belt in southern British Columbia. Westhaven controls ~60,263 hectares within four properties spread along this underexplored belt.

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The Shovelnose gold and silver project is the most advanced property, with a 2025 updated Preliminary Economic Assessment that validates the project’s potential as a robust, low cost and high margin 11-year underground gold mining opportunity with average annual life-of-mine production of 56,000 ounces gold and 313,000 ounces silver with a CDN$454 million after-tax net present value (at a 6% discount rate) and 43.2% IRR (base case parameters of US$2,400 per ounce gold, US$28 per ounce silver and CDN/US$ exchange rate of CDN$1.00=US$0.72).¹