Elk Lake is an alpine lake in Boise County, Idaho, United States, located in the Sawtooth Mountains in the Sawtooth National Recreation Area.

The lake is approximately 15 miles (24 km) southwest of Stanley and 9.5 miles (15.3 km) southeast of Grandjean.

Located in the remote central Sawtooth Wilderness, Elk Lake is most easily reached from the Grandjean trailhead to the northwest and downstream along the South Fork of the Payette River.

Edna Lake is in the Sawtooth Wilderness and wilderness permit can be obtained at trailheads.

This Boise County, Idaho state location article is a stub.