The Aspen Range forms the westernmost section of the Peale Mountains. This subrange extends south from the Blackfoot River for 23 miles, ending at the range’s highest point, Harrington Peak. Sulphur Peak (8,302 feet) is the only other named peak in the range. The range is administered by the BLM in the north end (which also includes many private land holdings) and by the Caribou-Targhee National Forest at its southern end.