Shelf 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 named for a distinct rock shelf extending around the south and west shores of the lake.

[1] The lake is accessed from Sawtooth National Forest trail 683.

[2] Shelf Lake is northeast of Merriam Peak and located in the lower section of the Boulder Chain Lakes Basin.

This Geographical stub article in Custer County, Idaho is a stub.