The Skaha Reservation uranium occurrence lies about 5.5 kilometres southwest of Penticton, British Columbia. This occurrence lies near the northwest end of a 2-kilometre northwest trending area of erratic uranium and thorium occurrences. The Skaha Reservation uranium occurrence was examined in 1977 by D.G. Leighton.

Regionally, the area is principally underlain by medium grained intrusive rocks of the Middle Jurassic Okanagan batholitic complex and Middle Jurassic Bromley batholith. The Okanagan batholitic complex consists primarily of biotite granite and granodiorite, locally porphyritic. The Bromley batholith consists of hornblende biotite granodiorite, quartz diorite and granite. Both are massive, light grey weathering, medium to coarse grained and equigranular. To the south, these intrusive rocks cut Carboniferous to Permian Kobau Group metasedimentary rocks and to the west cut Triassic rocks of the Shoemaker Formation, Old Tom Formation, Independence Formation, Nicola Group and other volcanic rocks. On its northern margin, the intrusive mass is in contact with an overlying assemblage of Eocene volcanics and sediments of the Penticton Group. The Kettle River Formation, consisting of granite boulder conglomerate, arkose, volcanic wacke and rhyolite breccia, is overlain by volcanics of the Springbrook and Marron formations.

Bedrock types at the Skaha Reservation uranium occurrence include the Kettle River Formation and Yellow Lake Member of the Marron Formation occurring along the southern margin of the Okanagan batholitic complex. The Kettle River formation is composed of granite boulder conglomerate, arkose, volcanic wacke and rhyolite breccia. The overlying Yellow Lake Member consists mostly of pyroxene-rich mafic phonolite lava and lesser purple-grey volcanic wacke, derived from erosion of the phonolite lava, a pink radioactive feldspathic trachytic ash flow, sandstone (grit) and conglomerate. Rhyolite and rhyolite tuffs comagmatic with the Eocene Shingle Creek porphyry outcrop to the immediate north of the Skaha Reservation uranium occurrence.

Radioactivity is associated with a pink grit unit, which occurs within wacke-shale lenses, intercalated in the lower part of the Yellow Lake Member alkaline volcanic assemblage. The well-layered grit unit is best exposed at the northwest end of Farleigh Lake, where it is 30 metres thick. The unit appears to be a channel deposit of reworked alkaline ash and ash flow material, as evidenced by a few examples of crossbedding, grading and scour marks. The unit also contains small coal partings and wisps up to 7.6 centimetres thick. Radioactivity of these rocks average 65 parts per million uranium and are in excess of 300 parts per million thorium (Assessment Report 6750). The most radioactive rocks have undergone zoisite-fluorite alteration and lesser quartz-carbonate and sericite alteration. The radioactive pink grit unit occurs as a northeast trending, discontinuous band over 4.5 kilometres. The beds are about 10 to 25 metres thick.

Uraniferous surficial occurrences are located on the Penticton Indian Reserve, occurring in faulted, discontinuous bands between Farleigh Lake and the lower section of Skaha Creek (Fieldwork 1978, pages 7-15). Field testing of the pink grits yielded scintillometer readings ranging from 300 to 600 counts per second (Fieldwork 1978, pages 7-15). Laboratory analyses of these same rocks yielded up to 0.021 percent thorium and 0.005 per cent uranium (Fieldwork 1978, pages 7-15). Much higher values are reported in certain carbonaceous seams associated with the grits.