The Winfield prospect is located 24 kilometres south-southwest of Vernon, between Wood Lake and Clark Creek.

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. Middle Jurassic granitic rocks of the informally named Terrace Creek batholith intrude the older rocks. Eocene Penticton Group and Miocene Chilcotin Group volcanic and sedimentary rocks cap areas of older rock.

The basal, partly cemented, well-rounded, quartz pebble gravels of Miocene fluvial deposits host placer gold mineralization. The fluvial deposits unconformably overlie gneissic rocks, amphibolite, granitic rocks and/or Early Tertiary volcanic rocks. The Miocene sediments are commonly overlain by Miocene plateau basalt flows. The gold is pure (850 fine), of a reddish colour, and is found as flattened pellets up to 2 millimetres in size, with some very fine gold reported. Garnet and a little magnetite occur with the gold. The fluvial deposits, including 082LSW019, 72 and 142, are estimated to cover a 5000 by 1550 by 60 metre area.

By 1936, exploration drifts of 107 and 52 metres had been completed. Between 1933 and 1945, a total of 2330 grams of placer gold production was reported from the Winfield camp (includes 082LSW019, 082LSW072 and 082LSW142) (Bulletin 28). In 1977-79, Union Oil Company explored the Miocene sediments for uranium. Geological mapping, hydrogeochemical, radiometric, airborne magnetometer and drill programs were conducted.