Castle Lake is an alpine lake in Custer County, Idaho, United States, located in the White Cloud Mountains in the Sawtooth National Recreation Area. The lake is accessed from Sawtooth National Forest trail 047.Sawtooth National Forest. "Sawtooth National Forest" [map].1:126,720, 1"=2 miles. Twin Falls, Idaho: Sawtooth National Forest, United States Forest Service, 1998.
Castle Lake is just north of Castle Peak and south of Merriam Peak. It is upstream of Baker Lake.
References
See also List of lakes of the White Cloud Mountains Sawtooth National Recreation Area White Cloud Mountains