Mr. Ken Armstrong reports

WESTHAVEN COMMENCES SUMMER PROGRAM AND PROVIDES EXPLORATION UPDATE ON SPENCES BRIDGE GOLD BELT PROJECTS

Westhaven Gold Corp. has started summer exploration activities on its four 100-per-cent-owned gold projects covering 61,512 hectares of the prospective Spences Bridge gold belt in Southern British Columbia. Current fieldwork includes prospecting, mapping and geochemical sampling, with a 3,000-metre exploration drill program, testing exploration targets at Shovelnose, expected to start in June.

Ken Armstrong, president and chief executive officer of Westhaven, stated: "Located in a region of Southern British Columbia with well-established transportation and power infrastructure and current mining activity, Westhaven's Spences Bridge gold belt properties are a unique Canadian gold exploration and development opportunity. With the recent closing of a $4.6-million private placement financing, Westhaven is well positioned to advance all four properties and build on the recent preliminary economic assessment of a potential high-grade, high-margin underground gold mining opportunity at the Shovelnose property (please see news release dated March 3, 2025, for details)."

Mr. Armstrong continued: "Prospecting, mapping and geochemical sampling programs are currently under way at Shovelnose, as well as the Skoonka North, Skoonka and Prospect Valley properties, with the goal of discovering and defining gold targets for future drill testing. A 3,000-metre summer exploration drilling program is expected to start at Shovelnose in June, continuing work to discover gold mineralization outside of the gold deposits that were the subject of the PEA. As also reported today, recent drilling of the Certes and Corral targets has confirmed that multiple, preserved epithermal systems are located within the Shovelnose property, and the potential for discovery of additional significant gold mineralization remains high."

2025 regional exploration of the Spences Bridge gold belt properties

Field exploration activities are well under way at Westhaven's Skoonka North, Skoonka and Prospect Valley properties. All three properties host low-sulphidation epithermal gold-silver mineralization and significant potential for new discoveries based on the presence of favourable host rocks, prominent structures conducive to fluid migration, mineralized float boulders, anomalous stream sediment and gold-in-soil anomalies, and prominent multielement pathfinder halos within exposed and drilled bedrock samples. Anomalous concentrations of pathfinder elements associated with epithermal mineralization commonly form a larger alteration halo around more restricted gold and silver mineralization, and can help prioritize and focus exploration in the field.

Initial spring fieldwork has focused on the Skoonka North property, where improved bedrock exposures resulting from forest fires in 2024 are currently being investigated and sampled. Additional evaluation and resampling of anomalous gold values in stream sediments and soil samples will follow at both Skoonka North and Skoonka. Westhaven also intends to expand on 2024 stream silt sampling at the Prospect Valley property, where results not only confirmed gold and silver anomalies associated with known gold showings but also highlighted seven new target areas with unsourced gold and pathfinder element anomalies. Follow-up prospecting and geochemical sampling will be prioritized in these anomalous areas.

Field exploration has also started within expanded areas of the Shovelnose property that were acquired in 2024. This work will be further supported by lidar survey data collected in late 2024. Work elsewhere at Shovelnose will include detailed evaluation of at least seven new pathfinder element anomalies identified from mapping, prospecting and rock samples collected in 2023 and 2024.

2025 Shovelnose winter drill program

Westhaven is also pleased to report results from 2025 winter exploration drilling at Shovelnose, which consisted of four holes (2,004 metres) testing the Certes and Corral target areas at the southeastern end of a broad 13-kilometre geochemical and structural corridor that hosts the South zone, FMN and Franz low-sulphidation epithermal gold deposits.

Certes is a three-kilometre-long target area defined at surface and in drilling by elevated pathfinder elements, structural offsets, brecciation, quartz and carbonate veining, and associated alteration that suggest preservation of an epithermal system in which significant gold-silver mineralization could occur. (For further background on the Certes target, please see the news release dated Dec. 12, 2024.)

Two drill holes tested the northwestern end of the Certes target, where angular sinter float and anomalous pathfinder elements discovered in 2024 strongly suggest proximity to a well-preserved epithermal system, including the possible local presence of a high-level mercury-venting plume. Drill holes SN25-427 and SN25-428 stepped out to the northeast of earlier drilling, with both encountering intervals of rhyolite and andesite breccia with anomalous pathfinder elements. A broad zone of trace-millimetre to centimetre-scale quartz-carbonate veining was intersected in SN25-427 from 462 m to the end of the hole at 508.9 metres. SN25-428 encountered a similar zone of 5- to 10-per-cent-quartz-carbonate veins (up to 20 cm wide) within andesites between 510-metre and 526-metre depth, followed, to the end of the hole at 565 m, by a mixed package of sedimentary and minor volcanic rocks that is highly anomalous in pathfinder elements mercury, antimony and arsenic.

A single drill hole tested the southeastern end of the Certes target (Certes 3), approximately two kilometres from Certes 1, where quartz veining and anomalous gold and pathfinder elements have been identified in surface rocks and 2024 drilling. Drill hole SN25-426 undercut earlier drill hole SN24-425, encountering a similar northeast-trending set of polymetallic quartz veins from 198 m to 221 m downhole, as well as the interpreted downdip extension of a broad zone of 2 to 20 per cent quartz plus or minus carbonate and quartz breccia veining in basalt from 427.9 m to 447.5 m downhole. This latter zone is slightly elevated in base metals (for example, 0.13 per cent copper over 0.55 m from 429.18 m and 0.10 per cent zinc over 4.25 m from 427.79 m), and represents a secondary target that requires additional follow-up.

A single drill hole (SN25-429) tested the previously undrilled Corral target, approximately two km southwest of Certes. Corral is defined by a prominent four-kilometre-long, northwest-trending region of anomalous gold and epithermal pathfinder elements within stream sediments and bedrock. Despite its proximity to Certes, Corral is defined by a different pathfinder element signature, suggesting a slightly different relative elevation within the epithermal mineralizing system. SN25-429 encountered several fault zones, a brecciated stockwork of 2- to 4-per-cent milky white massive quartz veinlets from 84.7 m to 94.0 m, and broad zones of carbonate veinlets (for example, 251.3 m to 263.0 m). These areas of quartz and carbonate veining display the same strongly elevated pathfinder element signature as observed in bedrock at surface, including weakly anomalous gold (background to 0.1 g/t) and silver (background to 0.9 g/t).

Drilling at Certes and Corral has confirmed the presence of low-sulphidation epithermal mineralized systems in this area of the Shovelnose property, and further drilling is warranted to fully test the area's potential to host significant gold and silver mineralization.

Qualified person statement

Peter Fischl, PGeo, who is a qualified person within the context of National Instrument 43-101, has read and takes responsibility for this release.

Sampling, laboratory analyses and quality assurance/quality control

Most core samples consist of halved drill core cut by manual sawing. 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 per cent passing a two-millimetre (Tyler 9 mesh, U.S. Std. No. 10) screen. A split of 250 grams is taken and pulverized to better than 85 per cent passing a 75-micron (Tyler 200 mesh, U.S. Std. No. 200) screen. Further analytical and assay procedures are conducted in ALS's North Vancouver facility. A 0.75-gram subsample of the pulverized split is subjected to four-acid digestion and analyzed by ICP-MS (method code ME-MS61m (plus Hg)), which reports a suite of 49 elements. All samples are also analyzed for gold by fire assay with an AES finish, method code Au-ICP21 (30-gram sample size). Samples returning gold values over 10 parts per million are subjected to ore grade check assays using fire assay and a gravimetric finish (method code Au-GRA21 and a 30-gram sample size). Other overlimit elements may also be subjected to ore grade analyses which vary depending on the element of interest. QA/QC includes 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 to 25 core samples. Additional blanks are inserted following samples with visible gold or significant concentrations of ginguro (fine-grained bands of dark grey to black sulphides). QA/QC data are evaluated on receipt for failures, and appropriate action is taken if results for duplicates, standards and blanks fall outside of allowed tolerances. Westhaven's continuing QA/QC programs are consistent with industry best practices and include auditing of all exploration data. Any significant changes will be reported when available.

About Westhaven Gold Corp.

Westhaven is a gold-focused exploration company targeting low-sulphidation, high-grade, epithermal-style gold mineralization within Canada's newest gold district, the Spences Bridge gold belt. Westhaven controls approximately 61,512 hectares (approximately 615 square kilometres) within four gold properties spread along this underexplored belt. The Shovelnose gold project is the most advanced property, with an updated 2025 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 gold production of 56,000 ounces and having a $454-million after-tax net present value discounted at 6 per cent and a 43.2-per-cent internal rate of return (base-case limits of $2,400 (U.S.) per ounce gold, $28 (U.S.) per ounce silver and Canadian-dollar/U.S.-dollar exchange rate of 72 cents). Initial capital costs are projected to be $184-million (Canadian) with a payback period of 2.1 years. Please see Westhaven's news release dated March 3, 2025, for details of the updated PEA. The technical report supporting this disclosure can be found under the company's profile on SEDAR+ and on the company's website. The Shovelnose gold project is situated off a major highway, near power, near rail, near large producing mines, near pipelines and within commuting distance from the city of Merritt, which translates into low-cost exploration and development.

Qualified person: The technical and scientific information in this news release has been reviewed and approved by Peter Fischl, PGeo, who is a qualified person for the company under the definitions established by National Instrument 43-101 (Standards of Disclosure for Mineral Projects). Westhaven trades on the TSX Venture Exchange under the ticker symbol WHN.

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