The Clair West occurrence is located on low slopes north of Both Creek, approximately 4.5 kilometres northwest of St. Mary Lake.

The area is underlain by argillites, wacke and quartzites of the middle Proterozoic Aldridge Formation, Purcell Supergroup. These have been intruded by gabbro sills and dikes of the middle Proterozoic Moyie intrusions.

Locally, a quartzite above a diorite sill hosts fractures with stringers and lenses of quartz containing galena with minor chalcopyrite, sphalerite and scheelite mineralization. Garnet is a common gangue.

In 1979, Cominco completed a program of soil sampling and geological mapping on the area as the Clair claims. In 1981, Cominco completed a single diamond drill hole, totalling 394 metres. In 1982 and 1983, Cominco completed a ground electromagnetic survey and a seismic survey on the area. In 1992, Cominco completed a 14.0 line-kilometre ground electromagnetic survey on the area. During 1996 through 1999, Abitibi Mining completed exploration programs of rock, soil and silt sampling, prospecting, geological mapping and three diamond drill holes, totalling 1238.6 metres, on the area as the Clair, Cleo and PMR claims. In 1999 and 2000, Rio Algom Exploration completed exploration programs consisting of geological mapping and rock sampling on the area as the Pyramid Peak property. In 2001, Abitibi Mining completed a program of geological mapping on the area. In 2003, Klondike Gold extended a previous drill hole from 1998 for a length of 725.1 metres. In 2010, Kootenay Gold completed a program of rock sampling and geological mapping on the area as the Big Smoke property. In 2014, the area was prospected and sampled by K. Craig.