Westhaven hits 10.04 m grading 12.18 g/t Au & 103 g/t Ag at Shovelnose

Drill hole SNR26-117 returned 10.04m grading 12.18 g/t Au and 103 g/t Ag, extending high-grade gold and silver mineralization below the deepest mining stopes proposed in Westhaven’s 2025 preliminary economic assessment (“PEA”).

Drill hole SNR26-110 returned 37.34m grading 6.24 g/t Au and 55 g/t Ag, confirming thick, high-grade gold and silver mineralization at the southeastern margin of the deposit.

35,000m resource infill drilling program is >76% complete, with four active drills on the South Zone deposit

VANCOUVER, British Columbia, Aug. 20, 2026 (GLOBE NEWSWIRE) -- Westhaven Gold Corp. (TSX-V: WHN) (OTCQB: WTHVF) (FRA: 1W5) (“Westhaven” or the “Company”) is pleased to report the fifth batch of assay results from the ongoing 35,000m resource infill drilling program, presently supported by four drill rigs at the South Zone gold and silver deposit on the Shovelnose gold property in southern British Columbia.

Ken Armstrong, President and CEO of Westhaven, commented:

“This latest batch of assays from ongoing resource infill drilling includes two drill holes that confirm the presence of thick, high-grade gold and silver mineralization both below and at the southeastern margin of the South Zone deposit. Drill hole SNR26-117 is of particular importance as its 10m interval grading 12.18 g/t Au and 103 g/t Ag has extended mineralization below the deepest proposed mining stopes in Westhaven’s 2025 preliminary economic assessment. Similarly, SNR26-110, returning 37.34m grading 6.24 g/t Au and 55 g/t Ag, has confirmed thick, high-grade mineralization at the southeastern edge of the deposit. Follow up drilling is required in the vicinity of both of these holes where there is clearly potential to increase contained ounces in the South Zone deposit.”

Highlight results reported today include intersections of 37.34m grading 6.24 g/t Au and 55 g/t Ag (SNR26-110) in the southeastern part of the South Zone deposit, and 10.04m grading 12.18 g/t Au and 103 g/t Ag (SNR26-117) located below the proposed mine development in Westhaven’s 2025 PEA.

In addition to the infill resource drilling, the 2026 field program continues with exploration drilling and surface field work within the greater Shovelnose property area and is expected to continue through mid-December. This work is being funded under a strategic earn-in agreement with Dundee Corporation (“Dundee”), whereby Dundee may earn up to a 60% interest in Westhaven's four Spences Bridge Gold Belt properties through up to CDN$85,000,000 in staged project expenditures. Under the first phase, Dundee has committed a minimum of CDN$30,000,000, inclusive of a fully funded 50,000m resource infill and exploration drill program and ongoing pre-feasibility study (“PFS”) work at Shovelnose.

South Zone Mineral Resource Infill Drilling

Assay results from the ongoing 35,000m resource infill drilling program at the South Zone deposit continue to show excellent continuity of mineralization in each of Vein Zones 1, 2 and 3. Results have been received from an additional 6 infill drill holes and are reported in Table 1. Earlier assays from the 2026 infill drilling program can be found Westhaven news releases dated: May 7, linked here , May 26, linked here , July 7, linked here , and July 28, linked here . The resource drilling program has been designed to infill the deposit at nominal 25m centres with results to be included in an updated mineral resource estimate to support a PFS targeting completion in H2 2027. To date, 85 drill holes (26,581m) have been completed representing approximately three-quarters of the planned program metreage.

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

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.

Figure 2 presents a South Zone cross-section highlighting drill hole SNR26-117, and Figure 3 presents a South Zone cross-section highlighting drill hole SNR26-110. The sections are viewed to the northwest (310°) and illustrate strong continuity of mineralization hosted within structurally controlled quartz veins and hydrothermal breccia zones.

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

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.

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.

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.

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.

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).

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. 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.

Figure 1 – Plan View Map August 2026

Figure 2 – South Zone Cross Section A-A’

Figure 3 – South Zone Cross Section B-B’

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. Or less than 2m in length with an individual sample returning >10 g/t Au. *Reported interval includes 4.10 contiguous metres with assays <1 g/t Au.

Table 1 – Assay Highlights

ABOUT WESTHAVEN GOLD CORP.

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.

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

On February 23, 2026, Westhaven closed a strategic earn-in agreement with Dundee Corporation, whereby Dundee may earn up to a 60% interest in Westhaven's four Spences Bridge Gold Belt properties through up to CDN$85,000,000 in staged project expenditures. Under the first phase, Dundee has committed a minimum of CDN$30,000,000, inclusive of a fully funded 50,000m drill program and pre-feasibility work at Shovelnose. The agreement allows for the accelerated exploration and evaluation of one of Canada's most compelling, undeveloped, high-margin gold and silver assets.

Qualified Person

The technical and scientific information in this news release has been reviewed and approved by Robin Hopkins, P.Geo. (NT/NU), Vice President, Exploration for Westhaven and a Qualified Person for the Company under the definitions established by National Instrument 43-101 Standards of Disclosure for Mineral Projects.

1 See Westhaven's news release entitled "Westhaven Announces Updated Preliminary Economic Assessment for the Shovelnose Gold Project, British Columbia" and dated March 3, 2025.

ON BEHALF OF THE BOARD OF DIRECTORS OF WESTHAVEN GOLD CORP.

“Ken Armstrong” President & CEO

For further information, please contact:

Kaeli Gattens Vice President, Communications T: 604-681-5558 E: kgattens@westhavengold.com W: www.westhavengold.com

Neither the TSX Venture Exchange nor its Regulation Services Provider (as that term is defined in the policies of the TSX Venture Exchange) accepts responsibility for the adequacy or accuracy of this release.

Forward-Looking Statements

This news release contains "forward-looking statements" within the meaning of applicable securities legislation. These forward-looking statements are made as of the date of this news release and Westhaven does not intend, and does not assume any obligation, to update these forward-looking statements, except as required by law.

Forward-looking statements in this news release may include, but are not limited to, statements with respect to completing approximately 50,000m of drilling during the year; completing an updated South Zone mineral resource estimate and the planned Pre-Feasibility Study; the results of the updated Preliminary Economic Assessment; future planned activities; future mineral production and future growth potential for the Company and its projects; the interpretation of preliminary results from exploration undertaken to date at the Shovelnose project using various exploration techniques and analysis; statements with respect to potential styles of epithermal mineralization at the Shovelnose Project; and, the possibility that the Company’s Shovelnose project may host multiple gold bearing epithermal systems.

In certain cases, forward-looking statements can be identified by the use of words such as "plans", "expects" or "does not expect", "is expected", "budget", "scheduled", "estimates", "forecasts", "intends", "anticipates" or "does not anticipate", or "believes", or variations of such words and phrases or state that certain actions, events or results "may", "could", "would", "might" or "will be taken", "occur" or "be achieved". Forward-looking statements are based on the opinions and estimates of management as of the date such statements are made, and they are subject to known and unknown risks, uncertainties and other factors that may cause the actual results to be materially different from those expressed or implied by such forward-looking statements or forward-looking information.

Assumptions have been made regarding, among other things, the price of gold and other precious metals; costs of exploration and development; the estimated costs of development of exploration projects; the Company’s ability to operate in a safe and effective manner and its ability to obtain financing on reasonable terms.

Although management of Westhaven Gold Corp. have attempted to identify important factors that could cause actual results to differ materially from those contained in forward-looking statements or forward-looking information, there may be other factors that cause results not to be as anticipated, estimated or intended. Many factors, both known and unknown, could cause actual results, performance, or achievements to be materially different from the results, performance or achievements that are or may be expressed or implied by such forward-looking statements or forward-looking information.

Such factors include, without limitation: the Company's dependence on one group of mineral projects; precious metals price volatility; regulatory, consent or permitting delays; risks relating to reliance on the Company's management team and outside contractors; risks regarding mineral resources and reserves; the Company's inability to obtain insurance to cover all risks, on a commercially reasonable basis or at all; currency fluctuations; risks regarding the failure to generate sufficient cash flow from operations; risks relating to project financing and equity issuances; risks and unknowns inherent in all mining projects, including the inaccuracy of reserves and resources, metallurgical recoveries and capital and operating costs of such projects; laws and regulations governing the environment, health and safety; operating or technical difficulties in connection with mining or development activities; employee relations, labour unrest or unavailability; the Company's interactions with surrounding communities; the speculative nature of exploration and development, including the risks of diminishing quantities or grades of reserves; stock market volatility; conflicts of interest among certain directors and officers; and the factors identified under the caption “Risk Factors” in the Company’s management discussion and analysis.

Mineral exploration involves a high degree of risk and few properties, which are explored, are ultimately developed into producing mines. There can be no assurance that such forward-looking statements or information will prove to be accurate, as actual results and future events could differ materially from those anticipated in such statements. Accordingly, readers should not place undue reliance on forward-looking statements and forward-looking information. The Company will not update any forward-looking statements or forward-looking information that are incorporated by reference herein, except as required by applicable securities laws.

Infographics accompanying this announcement are available at

https://www.globenewswire.com/NewsRoom/AttachmentNg/52fcb67f-4e2e-4db8-9742-26ee55d987fd

https://www.globenewswire.com/NewsRoom/AttachmentNg/fb466c01-1dd6-4703-9fb4-983847075809

https://www.globenewswire.com/NewsRoom/AttachmentNg/fc67f859-6d7e-48cf-8338-430afb94c463

https://www.globenewswire.com/NewsRoom/AttachmentNg/a4b7fd8f-c985-4731-99db-97b7fe3d78f8

GlobeNewswire

August 20, 2026 - 4:00 AM PDT

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