The Bow 31 showing is located on the east bank of Todd Creek, approximately 13.5 kilometres south of the confluence of Todd Creek with the Bowser River.

The area of the showing is underlain by the Lower Jurassic Unuk River Formation of the Hazelton Group (Bulletin 63). The formation comprises red, purple and green volcanic breccia, conglomerate, siltstone, sandstone and lithic and crystal tuffs. The tuffaceous rocks are weakly to strongly silicified along sheared or faulted zones, especially along valley bottoms. Several well silicified, gossanous zones occur along Todd Creek (Assessment Report 17477).

The showing consists of a massive to weakly foliated fine-grained felsic tuff that contains 7 to 10 per cent finely disseminated pyrite. A grab sample assayed 175.9 grams per tonne silver, 0.52 per cent zinc and 0.41 per cent lead (Assessment Reports 18820, 20089).

Reconnaissance work during 1987-88 by Brucejack Gold Ltd. outlined several areas of anomalous gold values in stream sediments. One area was outlined west of the Bow 31 claim (on the Toc 7 claim). In 1987, Brucejack also sampled old trenches west of the Bow 31 claim, on the Todd Creek North gold-copper zone (104A 106). Grab samples assayed up to 5.49 grams per tonne gold (Assessment Report 17477).

In 1987 and 1988, Brucejack Gold Ltd. staked the Bow 1-41 claims and conducted reconnaissance exploration and trenching. An area of anomalous gold and silver values, in bedrock, was outlined in 1987 on the boundary of the Bow 31 and 32 claims. In 1990, Marlin Developments analyzed the previously collected silts and rocks for base metals.

In 2017 stream sediment samples were collected by Millrock Resources Inc from streams that drain the topographically higher area to the east and southeast of MINFILE occurrence Bow 31 (104A 104). Millrock stated that some of the strongest sediment values were recovered from isolated samples in these historically unexplored areas, including the East Todd Creek area about 1 kilometre southeast of Bow 31. Stream Sediment sample W366336, taken from a northwest flowing stream yielded 2.66 parts per million silver, 352 parts per million arsenic, 19.15 parts per million antimony and 1285 parts per million zinc (Assessment Report 37268, Table 3 and Map 2a(1)).

Refer to Todd Creek-South zone (104A 001) for a detailed work history of the Todd Creek property area showings.