Skaha Lake, historically known as Dog Lake and originally Lac Du Chien, is a freshwater lake located along the course of the Okanagan River in the Okanagan Valley of British Columbia, Canada. It has a surface area of approximately 20 km², with a maximum depth of 55 metres. The lake is situated directly south of Okanagan Lake and forms the southern shoreline and boundary of the city of Penticton, British Columbia.