• Drilling intersected 105m @ 2.41g/t Au, including high-grade intervals
• New high-grade structure interpreted, similar to Musgrave Minerals' Break of Day
• Eaglehawk deposit outside current mineral resource, to be included in future update

Drilling at the emerging Eaglehawk deposit within Great Boulder Resources' flagship Side Well Gold Project has intersected a significant new high-grade zone, with 105m @ 2.41g/t Au from 95m in drill hole 25EHRC040. This intersection includes several higher-grade intervals, such as 3m @ 18.85g/t Au from 102m, 13m @ 5.17g/t Au from 114m, and 6m @ 5.08g/t Au from 180m. The company interprets this as a new northwest-trending, northeast-dipping high-grade structure, which may be analogous to the high-grade link structures that host the majority of the gold at Musgrave Minerals' nearby Break of Day deposit. This is the first time Great Boulder has specifically targeted this style of structure at Eaglehawk. The Eaglehawk deposit is currently outside the existing Side Well Mineral Resource Estimate of 668,000oz at 2.8g/t Au, and the company plans to include it in the next global resource update scheduled for December 2025. Further RC drilling is being planned to confirm the extent and orientation of this new high-grade zone and to target additional similar structures.

Great Boulder is planning additional RC drilling to continue testing the new high-grade structure at Eaglehawk and to target other similar structures. The company is also considering using a diamond drill rig to obtain more structural information on the high-grade zone.