Sapphire Lake (Idaho)
 Sapphire Lake is an alpine lake in Custer County Idaho United States located in the White Cloud Mountains in the Sawtooth National Recreation Area. No trails lead to the lake but it can be most easily accessed from Sawtooth National Forest trail 601.Sapphire Lake is east of D. O. Lee Peak in the Big Boulder Lakes Basin along with Cove Hook and Cirque Lakes.