The Olga showing is located on the north side of Bitter Creek, about 1 kilometre west of the confluence with Radio Creek.

The area is underlain by north striking, west-dipping argillites and quartzites of the Middle Jurassic Salmon River Formation (Hazelton Group) (Geological Survey of Canada Memoir 175; Bulletin 63).

A northeast trending, northwest-dipping vein of quartz and brecciated argillite crosscuts the strike of the rocks at a low angle. The vein averages 0.6 metre wide and has been traced for 76 metres on surface; it is exposed over a length of about 46 metres in the adit. The vein is mostly barren except for small shoots of chalcopyrite. One lens of nearly pure chalcopyrite is up to 7.6 metres long and 20 centimetres wide.

Opencuts and a 91 metre long adit were emplaced before 1910. That year the Olga claim group was owned by Olga Mines Limited. Exploration work comprised 18 metres of tunnelling. No further work has been reported on the showing.