The Tough occurrence is located about 6 kilometres south of Matetlo Creek, approximately 72 kilometres northwest of the community of Germansen Landing.
At the showing, chalcopyrite occurs in gossanous lithic tuff of the Upper Triassic Plughat Mountain Formation (Takla Group). In this area, the formation consists mainly of tuffs, tuffaceous siltstone, argillite, agglomerate and minor limestone. In 1991, a grab sample taken at this location assayed 0.08 per cent copper (Open File 1992-11, Map Sheet 2, Map Number 42).
The mineralized outcrop was discovered during the 1991 regional mapping program of the British Columbia Geological Survey.