Great Boulder Extends High-Grade Gold at Side Well

22 July 2026 | Western Australia - Great Boulder Resources has reported further high-grade gold results from drilling at its Side Well Gold Project near Meekatharra in Western Australia.

The latest drilling has extended known mineralisation outside the project’s 1.02Moz Resource, with new results reported from the Mulga Bill, Eaglehawk and Ironbark deposits.

Key drilling highlights include:

• 7m at 14.5 g/t gold from 56m at Eaglehawk
• 4m at 9.12 g/t gold from 80m at Eaglehawk
• 8m at 4.30 g/t gold from 84m at Eaglehawk
• 0.64m at 82.8 g/t gold from 265.36m at Eaglehawk
• 6m at 14.8 g/t gold from 265m at Mulga Bill
• 18m at 7.36 g/t gold from 120m at Mulga Bill

Great Boulder said the latest results extend Mulga Bill East by more than 400m, defining high-grade gold over a total strike length of around 900m.

Managing Director Andrew Paterson said extensional drilling at Mulga Bill and Eaglehawk had intersected more high-grade gold in several areas, extending gold lodes across multiple parts of the system.

Why it matters: Side Well is continuing to show strong resource growth potential beyond the existing resource envelope. The combined Mulga Bill and Eaglehawk deposit now extends over around 2.5km of strike, with recent drilling confirming mineralisation in the gap between the two areas.

The company also reported a strong result from metallurgical drilling at Ironbark, with one diamond hole intersecting 5.89m at 18.1 g/t gold. The hole was drilled to obtain core for geotechnical assessment and metallurgical sampling.

Drilling is continuing at Side Well, with a diamond rig operating at Golden Bracelet and an aircore rig testing regional targets in the Eastern Corridor.

Great Boulder is also drilling at its recently acquired Peak Hill Gold Project, which hosts a 481,000oz Resource. Two RC rigs are currently operating at Peak Hill, with 40,000m of drilling planned in the current half-year.

For Western Australia’s gold sector, Great Boulder’s update adds further momentum to the Murchison region, with high-grade drilling results, resource extensions and multiple active drilling programs across Side Well and Peak Hill.

Source: Great Boulder Resources ASX announcement, “High-grade hits continue to extend known mineralisation outside 1.02Moz Resource”, 22 July 2026.