Kalamalka Lake is a large lake in the interior plateau of southern central British Columbia, Canada, east of Okanagan Lake. The lake is located approximately 4 kilometres (2.5 mi) south of the city of Vernon and is its main drinking water supply. The lake is named after the Okanagan First Nation chief who occupied its northern shores.

The Okanagan, also called the Okanagan Valley and sometimes the Okanagan Country, is a region in the Canadian province of British Columbia defined by the basin of Okanagan Lake and the Canadian portion of the Okanagan River. It is part of the Okanagan Country, extending into the United States as Okanogan County in north-central Washington. According to the 2016 Canadian census, the region's population is 362,258. The largest populated cities are Kelowna, Penticton, Vernon, and West Kelowna.