Mount Regan, rises 10,190 feet (3,110 m) above sea level, and is a peak in the Sawtooth Range of Idaho.The peak is located in the Sawtooth Wilderness of Sawtooth National Recreation Area on the border of Boise and Custer counties.The peak is named after Timothy Regan, a pioneer who lived in Silver City, and then Boise.Mount Regan is located at the southern end of Sawtooth Lake.This Boise County, Idaho state location article is a stub.