Liberty Lake is located 1 kilometre west of Little White Lake (EMPR Bulletin #4)and 22 kilometres west of 70 Mile House.
The lake is a semi-evaporitic playa lake. It is located in the "Green Timber Plateau" area (EMPR Bulletin 4), a semi-arid plateau area averaging 1130 metres elevation which is part of the Cariboo Plateau and host to several playa lakes. The area is underlain by alkaline plateau basalt flows of the Miocene to Pleistocene Chilcotin Group, mantled by a thin cover of glacial till and glaciofluvial sediments. Annual precipitation averages between 300 and 400 millimetres (EMPR Paper 1991-1).
Liberty Lake contains sodium carbonate-rich brine and "winter crystal" (natron or hydrated sodium carbonate). At the end of the dry season in 1937 (EMPR Bulletin 4) brine covered approximately 5 hectares to a depth of 20 centimetres. A white encrustation approximately 2.5 centimetres thick (EMPR Bulletin #4) had acumulated on the northern shore of the lake. The mud surrounding the lake was heavily encrusted with white efflorescence and "winter crystal" was in the process of formation. The brine has a specific gravity of 1.1255 and contains 13.78 per cent total solids which were composed of 81.5 per cent sodium carbonate, 11.7 per cent sodium sulphate and 6.5 per cent sodium chloride (EMPR Bulletin 4). Canadian Occidental Petroleum collected two water and two winter crystal samples in 1989 and completed analyses for sodium carbonate and other alkalai salts (Assessment Report 20080). Canoxy also completed an airborne infrared survey to test for dissolved solids in the lakewaters.