The Fishtrap Creek showing is located on the north side of Mount Hagen and east of Fishtrap Creek, eight kilometres west of Barriere. It is accessible on secondary roads.

Chalcopyrite, pyrite, magnetite and possibly some sulphide nickel mineralization occur in small plugs of pyroxenite (Geology, Exploration and Mining in British Columbia 1972, page 315) which intrude "greenstones" and diorites. Trenching exposed mineralization in a southwest-trending "shear zone" about 21 metres wide within a narrow band of ultramafic rock. Preliminary chip samples in the trenches gave an average of about 0.22 per cent copper over 22 metres and a strike length of 30 metres. The age of the pyroxenite plugs is not known, however the dioritic rocks are probably part of the Upper Triassic to Lower Jurassic Thuya batholith. The "greenstones" are possibly part of the late Paleozoic Harper Ranch Group.

Pyramid Mining Company Limited undertook geological mapping and soil and silt geochemical surveys (535 samples) in 1970. In 1970, Cambridge Mines Limited staked the C.P. group of 32 claims after obtaining some evidence of copper mineralization in random geochemical drainage sampling. In 1972, Cambridge completed soil geochemical surveys (720 samples) as well as ground magnetic and electromagnetic surveys.