Timpa Lake is a small alpine lake in Elmore County, Idaho, United States, located in the Sawtooth Mountains in the Sawtooth National Recreation Area. The lake is accessed from Sawtooth National Forest trail 479 along Timpa Creek Creek. Timpa Lake is in the Sawtooth Wilderness, and a wilderness permit can be obtained at a registration box at trailheads or wilderness boundaries. It is downstream of Chickadee Lake, Surprise Lake, Confusion Lake, and Low Pass Lake.