The 12,720-foot (3,877 m) peak is located in the Rocky Mountain National Park Wilderness, 10.1 miles (16.2 km) southwest by west (bearing 240°) of the Town of Estes Park, Colorado, United States, on the Continental Divide between Grand and Larimer counties.

[7] Hallett arrived in the Estes Park area as a young MIT-trained engineer on vacation in 1878.

He became enamored with the area and decided to remain, and became a rancher based in Loveland, Colorado.

[8] The mountain's toponym was officially adopted in 1932 by the United States Board on Geographic Names.

[10] Due to its altitude, it receives precipitation all year, as snow in winter and as thunderstorms in summer, with a dry period in late spring.