Central Gawler Mill’s Stage 1 Gold Resources Grow to 223koz

Shifting Focus to Higher-Grade Tailings and Open Pit Materials

ADELAIDE, AUSTRALIA / June 29, 2025 / Barton Gold Holdings Limited (ASX:BGD) (FRA:BGD3) (OTCQB:BGDFF), a burgeoning player in the Australian gold sector, is signaling a strategic pivot with an updated Mineral Resources Estimate (MRE) for its South Australian Challenger Gold Project. This move highlights a pragmatic approach to production, prioritizing readily accessible and higher-grade material to de-risk and accelerate the path to operational status.

The updated MRE at Challenger now stands at 223,000 ounces of gold, encompassing 9.56 million tonnes at a grade of 0.72 g/t of gold. Crucially, this resource includes 81,200 ounces of gold situated within the existing high-grade open pit zones, presenting an immediate and tangible opportunity for Barton Gold.

Furthermore, Barton Gold has identified several promising sources of economically viable gold mineralization in close proximity to its Central Gawler Mill. These deposits are eyed as lower-cost and lower-risk “Stage 1” mill feed. The company is targeting the completion of feasibility studies by the end of 2025, with an ambitious aim to commence initial “Stage 1” operations by the close of 2026.

A key element of this “Stage 1” strategy involves evaluating the reprocessing of tailings, particularly from Facility 1 (TSF1). This facility, operational between 2002 and 2009, supported open pit mining at Challenger Main and higher-grade underground operations. Analysis indicates a concentration of higher-grade mineralization around the periphery of TSF1, a direct result of the processing methods employed during its operational period.

Validation drilling conducted in 2023 and 2025 has provided compelling evidence of these higher-grade intervals within TSF1, with select examples including:

Table – Select Challenger TSF1 higher-grade intervals from 2023 and 2025 validation drilling

Commenting on the updated JORC Mineral Resources, Barton MD Alexander Scanlon stated, “As we’ve signaled over the past two years, our focus has been on unlocking the potential of JORC Mineral Resources immediately surrounding our fully permitted Central Gawler Mill. This existing infrastructure is a significant advantage for Barton Gold’s investors, offering a clear pathway to production that is shorter, less capital-intensive, and lower in risk. The current market conditions and the sustained upward trend in gold prices now present a compelling opportunity to exercise this ‘real option’.”

“Our objective,” Scanlon continued, “is to complete the necessary feasibility analyses throughout the remainder of 2025 to determine the optimal development strategy. We are strategically positioned to commence our initial ‘Stage 1’ operations before the end of 2026, capitalizing on the favorable market dynamics.”

Further details regarding this strategic update are available in the full announcement on the ASX website and the investor section of Barton’s website.

About Barton Gold

Barton Gold is an Australian gold developer listed on the ASX, OTCQB, and Frankfurt Stock Exchange. The company is targeting an annual production of 150,000 ounces of gold, supported by substantial JORC Mineral Resources of 1.9Moz Au and 3.1Moz Ag. Barton Gold boasts brownfield mines and holds 100% ownership of the region’s sole gold mill, strategically located within the renowned Gawler Craton of South Australia.

Tarcoola Gold Project Fully permitted open pit mine with approximately 20,000 oz Au, situated within trucking distance of Barton’s Central Gawler Mill. Historical goldfield with recent high-grade gold-silver discoveries assaying up to 83.6 g/t Au and 17,600 g/t Ag. Tunkillia Gold Project Challenger Gold Project

Competent Persons Statement & Previously Reported Information

The information presented herein regarding historic Exploration Results and Mineral Resources is based on, and accurately represents, data and supporting documentation prepared by qualified Competent Persons. These individuals are either employees of or independent consultants to the Company and are members or fellows of the Australasian Institute of Mining and Metallurgy (AusIMM), Australian Institute of Geoscientists (AIG), or a Recognised Professional Organisation (RPO), ensuring adherence to the JORC Code 2012 standards. The Company confirms that the information included in this announcement is consistent with the findings presented in previous disclosures, and no new information or data materially affecting these results or estimates has arisen.

Cautionary Statement Regarding Forward-Looking Information

This document may contain forward-looking statements, which are subject to inherent risks and uncertainties that could cause actual results to differ materially from expectations. Barton Gold undertakes no obligation to update these forward-looking statements or any information contained herein. Forward-looking statements are based on current estimates and opinions and should not be relied upon as a guarantee of future performance.