The Dunvegan occurrence is located in Glacier National Park, on Bain Brook, 1.5 kilometres from its confluence with the Incomappleux River, about 50 kilometres east-northeast of Revelstoke.

The Dunvegan vein strikes 355 degrees and dips 50 degrees east, and is hosted in a shear zone in slate and calcareous shale of the Lower Cambrian and younger Lardeau Group. The vein is reported to have been 2.4 to 3 metres wide. Mineralization consists of galena and sphalerite in a quartz (inferred) gangue.

Two adit tunnels were driven about 33 metres apart vertically to exploit the vein. Another short tunnel was driven only 4.5 metres vertically above the lower adit. The lower tunnel was driven for 60 metres, the uppermost tunnel for 21 metres, and the middle tunnel for 15 metres. A sample from a small pile of carefully selected ore from the uppermost tunnel analysed 2502 grams per tonne silver, 65.2 per cent lead and 7.2 per cent zinc (Minister of Mines Annual Report 1918, page K157).

The Alma claim covered a southwesterly extension of the Dunvegan vein and an adit was driven for 30 metres.