A prominent mountain standing 7 nautical miles (13 km; 8.1 mi) north of Mount Crowell in the northwest part of Guettard Range.

A mountain, 1,105 metres (3,625 ft) high, standing 2 nautical miles (3.7 km; 2.3 mi) northwest of Kelsey Cliff at the south side of Johnston Glacier.

A prominent cliff standing close southeast of Mount Owen in the east end of the Guettard Range.

Mountain about 6 nautical miles (11 km; 6.9 mi) west of Kelsey Cliff in the southeast part of Guettard Range.

A mountain on the east flank of Irvine Glacier, standing 11 nautical miles (20 km; 13 mi) southwest of Mount Owen.

Named by US-ACAN for William B. Mull, cook at South Pole Station in 1964[8] This article incorporates public domain material from websites or documents of the United States Geological Survey.