The May showing is located 19 kilometres north-northwest of Vernon, east of Round Lake.
In this area, sedimentary and volcanic rocks of the Upper Triassic to Lower Jurassic Nicola Group are in fault contact to the north with Cambrian-Ordovician volcanic (Tsalkom Formation) and sedimentary (Sicamous Formation) rocks, and in probable unconformable contact with Devonian to Triassic sedimentary and volcanic rocks of the Harper Ranch Group to the south. Cretaceous granodiorite plugs intrude the Nicola, Sicamous and Tsalkom rocks. Outliers of Eocene Kamloops Group volcanic rocks are present in the area.
Sicamous argillaceous rocks host a quartz vein carrying "values in gold, silver and lead" (Geological Survey of Canada Summary Report 1931A).
By 1899, exploration included a 2 metre shaft and an 8 metre tunnel.