Stave Lake is a lake and reservoir for the production of hydroelectricity in the Stave River system, located on the northern edge of the District of Mission, about east of Vancouver, British Columbia, Canada. The main arm of the lake is about long from north to south and its southwest arm, ending at Stave Falls Dam near Stave Falls, is about long. The total area of the lake currently is about . Prior to construction of the dam, the lake was about one-third the size of its current main arm.