Stephenson Bastion (80°46′S 27°12′W / 80.767°S 27.200°W / -80.767; -27.200) is a mountain massif with steep rock cliffs on its south side, rising to 1,850 metres (6,070 ft) in the south-central part of the Shackleton Range.

It was named by the United Kingdom Antarctic Place-Names Committee (UK-APC) for Philip J. Stephenson, an Australian geologist with the transpolar party of the CTAE in 1956–58.

[1] Download coordinates as: Features of the massif that are named on the 1983 United States Geological Survey map are (west to east):[2]

Ice-free mountain rising to 1,490 metres (4,890 ft) and surmounting the west extremity of Stephenson Bastion in the Shackleton Range.

A line of east–west cliffs rising to over 1,600 metres (5,200 ft) at the south margin of Fuchs Dome, Shackleton Range.