The Pup 1 (Crystal Lake) occurrence is located on a peninsula separating Crawford Bay and Kootenay Lake, approximately 1.5 kilometres south of McGregor Lake.

The area is underlain by schist, dolomite, limestone, marble and calcareous sedimentary rocks of the Cambrian to Devonian Index Formation (Lardeau Group) and Lower Cambrian Badshot Formation. Quartzite and quartz arenite sedimentary rocks of the Upper Proterozoic to Lower Cambrian Hamill Group outcrop to the south and east. These have been intruded by Cretaceous granite to the northwest.

Locally, marbles of the Lower Cambrian Badshot Formation host pyrite, sphalerite and galena mineralization.

In 1991, a sample (32004) assayed 1.117 per cent zinc, 0.169 per cent lead and 4.7 grams per tonne silver (Assessment Report 21793).

In 1928, D. Broster, M. Johnson and associates staked the area and conducted tunnelling and trenching on two showings. During 1973 through 1979, Cominco Ltd. completed programs of soil sampling, ground geophysical surveys and four diamond drill holes, totalling 306.0 metres, on the area as the Craw claims. In 1990 and 1991, Bruce Doyle prospected and sampled on the Sure Bet and Pup claims. In 1991, Kokanee Explorations completed a program soil sampling and ground geophysical surveys on the area as the Arc property. During 1996 through 1998, Cominco completed programs of soil sampling and ground geophysical surveys. In 2001, Klondike Gold completed three diamond drill holes, totalling 303.3 metres, and a 8.4 line-kilometre ground electromagnetic survey on the area. In 2010, a program of rock sampling was completed on the area. In 2012, Noram Ventures completed a program of geological mapping, rock sampling and seven diamond drill holes, totalling 1375.6 metres, on the area. This work was centered on graphite exploration.