The Harris Creek deposit is located 6 kilometres south-southwest of Lumby, at Harris and Nicklen Creeks.

In this area, east of the Okanagan Valley fault zone, sedimentary and volcanic rocks of the Devonian to Triassic Harper Ranch Group are in probable fault contact with metamorphic rocks. The Harper Ranch Group is unconformably overlain by Upper Triassic to Lower Jurassic Nicola Group volcanic and sedimentary rocks. Middle Jurassic granitic rocks intrude the older rocks. Eocene Penticton Group and Miocene volcanic and sedimentary rocks cap areas of older rock.

A paleo-channel of Quaternary age or older, perched about 6 metres above Harris Creek, hosts placer gold mineralization. The poorly-sorted, stratified, angular boulder gravel of generally local derivation hosts coarse gold. The nuggets weigh up to 55 grams, are dark in colour and thoroughly polished. The gold is pure with a fineness of 874. Very minor black sand is reported. The channel is up to 18 metres wide and 14 metres deep. Gold-bearing remnants of the channel gravels occur to the east along the sides of Harris Creek.

The old channel was discovered in 1936 by A. Brewer and P. Johnson. Exploration adits and pits were dug both west of Harris Creek and east along its banks. Hydraulic mining on the west bank removed about 800 cubic metres of channel material. Between 1936 and 1945, 14150 grams of placer gold were produced (Bulletin 28, page 63). In 1978, Union Oil Co. of Canada Ltd. explored the sediments for uranium. Geological mapping, hydrogeochemical, soil geochemical and radiometric programs were conducted.