Murtle Lake is a lava dammed lake located in Wells Gray Provincial Park, east-central British Columbia, Canada. It is fed primarily by the Murtle River which rises from a large unnamed glacier in the Cariboo Mountains at an elevation of 2,300 m (7,546 ft) and flows southwest for 18 km (11 mi) to the lake. The Murtle River also drains Murtle Lake then flows southwest for 36 km (22 mi) into the Clearwater River.