Part of the Aleutian Range, Mount Stepo is located 30 miles (48 km) north-northeast of Sand Point near the southwest end of the Alaska Peninsula.

It is set on the west shore of Stepovak Bay and within the Alaska Peninsula National Wildlife Refuge.

Topographic relief is significant as the summit rises over 3,800 feet (1,158 meters) above tidewater at American Bay in 1.5 miles (2.4 km).

[7] Weather systems coming off the North Pacific are forced upwards by the mountains (orographic lift), causing heavy precipitation in the form of rainfall and snowfall.

This climate supports a small unnamed glacier on the west slope of the peak.