The Fort showing is located on the west side of Old Fort Mountain, 4 kilometres north of Babine Lake, 82 kilometres east-southeast of Hazelton.

The area is underlain by rocks of the Kitsumkalum shale, an informal subdivision of the Lower Cretaceous Skeena Group, the Middle Jurassic to Lower Cretaceous Ashman Formation (Bowser Lake Group) and the Middle Jurassic Smithers Formation (Hazelton Group). These have been intruded by the Eocene Babine Intrusions which comprise monzonite, biotite feldspar porphyry, hornblende feldspar porphyry, feldspar porphyry and diorite. The main sedimentary lithologies are conglomerate, greywacke, shale and siltstone which are hornfelsed adjacent to the Babine Intrusions. Andesitic volcanic rocks are intercalated with some of the sedimentary strata. Numerous northwest-trending block faults traverse the area.

Sulphide mineralization, consisting of pyrite and minor chalcopyrite, occurs adjacent to and within the small plugs of biotite feldspar porphyry.