It is located within the central portion of the Douglas Range, standing at the heads of Toynbee Glacier and Sedgwick Glacier 13 kilometres (8.1 mi) west of George VI Sound, near the east coast of Alexander Island within the British Antarctic Territory.

[2] The mountain was probably first seen in 1909 by the French Antarctic Expedition under Charcot, but not recognized as part of the Douglas Range.

It was first surveyed in 1936 by Stephenson, Fleming, and Bertram of the British Graham Land Expedition (BGLE) under Rymill.

The east side of the mountain was resurveyed in 1948 by the Falkland Islands Dependencies Survey (FIDS) who named the feature for Alfred Stephenson, surveyor and leader of the BGLE party to George VI Sound in 1936.

This article incorporates public domain material from "Stephenson, Mount".