The Bait Range occurrence is located at the head of Boucher Creek, on the west side of the Bait Range due south of Ankwill Pass, about 100 kilometres north-northeast of the community of Smithers. An unnamed lead-zinc occurrence (#201) is identified from Geological Survey of Canada Open File 2322 and is shown as being a vein or a fracture-controlled occurrence. Galena and sphalerite mineralization is inferred.

The area is underlain by the Lower Jurassic Nilkitkwa Formation (Hazelton Group) consisting of marine tuffaceous argillite, shale, siltstone, greywacke, ash and lapilli tuff, ash-flow rhyodacite tuff, basaltic tuff and breccia, minor limestone, conglomerate and sharpstone conglomerate.

In 1985, the Chawill 1-3 claims were staked by Placer Development Limited to cover two principal areas of anomalous stream sediment and soil geochemistry identified during reconnaissance exploration programs carried out in 1983 and 1984. Three reconnaissance soil lines (187 samples) and two compass-and-chain soil grids (163 and 164 samples, respectively) were run on the property in an attempt to evaluate the extent and significance of the mineralization contributing to the various anomalies. A well-defined lead, zinc anomaly (Anomaly A) was traced to a headwater tributary of Boucher Creek, and a diffuse area of anomalous copper, zinc and lead geochemistry was identified in the drainage immediately to the north.

The source of the lead, zinc anomaly (Anomaly A) encountered in the Boucher Creek drainage has not been identified in outcrop. The anomaly is underlain by a succession of weakly pyritic shales and siltstones and also contains a minor amount of fine felsic tuff. The assemblage is fractured and weakly mineralized with pyrite. The diffuse copper, zinc, lead anomaly noted in soils collected in the northern drainage (Anomaly B) appears to reflect a variety of sources of mineralization both within the Nilkitkwa Formation package and possibly also along its fault controlled southwestern contact. Geochemically anomalous rock samples were located in the vicinity of a felsic volcanic unit which crops out immediately to the northeast of the contact. Samples consist of felsic lapilli and crystal tuff and interbedded cherty sediment. Some of the samples contain a significant trace of pyrrhotite (Assessment Report 14957).