Regan Lake is a small alpine lake in Boise County, Idaho, United States, located in the Sawtooth Mountains in the Sawtooth National Recreation Area. The lake is most easily accessed from Sawtooth National Forest trail 453.Sawtooth National Forest. “Sawtooth National Forest” [map].1:126,720, 1”=2 miles. Twin Falls, Idaho: Sawtooth National Forest, United States Forest Service, 1998.
Regan Lake is in the Sawtooth Wilderness, and a wilderness permit can be obtained at a registration box at trailheads or wilderness boundaries. The Trailer Lakes are upstream of Regan Lake, and Mount Regan at is to the east of the lake.
References
See also List of lakes of the Sawtooth Mountains (Idaho) Sawtooth National Forest Sawtooth National Recreation Area Sawtooth Range (Idaho)