MAYFAIR GOLD CORP.

Exploration Program

As of June 30, 2026, the Company has completed a total of 461 surface drill holes on the Fenn-Gib Project, representing 210,804 metres.

A summary of the Company’s drilling program for the Fenn-Gib Project is as follows:

In February 2026, the Company reported initial results from its 2025 Grade Control Drilling Program, which comprised 56 tightly spaced (10 m x 10 m) vertical diamond drill holes totaling approximately 4,204 metres within the core of the Phase 1 starter pit. The program was designed to validate local grade variability, support improved ore-waste boundary definition, and inform dilution and ore-loss assumptions in advance of project financing and construction. These results were not incorporated into the 2026 PFS.

In June 2026, the Company reported the final results and evaluation of the tight-spaced Grade Control (GC) drilling program. The GC program returned positive results, confirming approximately 1 million tonnes of ore-grade material that was categorized as probable mineral reserves in the PFS; roughly 25% of the Phase 1 planned designed. For material above 0.80 g/t gold cut-off grade, the GC model returned similar grade and 2% more tonnes than predicted by the probable mineral reserve model. For the higher-grade portions, above a 3.0 g/t gold cut-off grade, the GC model identified 28% more tonnes at 7% higher grade, representing 37% more gold than the probable mineral reserve model for the GD drilling test area. The findings support the accuracy of the mineral reserve block model in the Stage 1 starter pit area tested and validate the higher-grade component of the mineral reserve for mine planning.