Edna Lake is an alpine lake in Boise County, Idaho, United States, located high in the Sawtooth Mountains in the Sawtooth National Recreation Area. The lake is approximately 17 miles (27 km) southwest of Stanley and 14.5 miles (23.3 km) southeast of Grandjean. Located in the remote central Sawtooth Wilderness, Edna Lake can be reached by trails from many directions, including the Sawtooth Valley (east), Grandjean (northwest), Redfish Lake (north), and Atlanta (south).