It is located 5 nautical miles (9.3 km; 5.8 mi) southwest of Mount Freed where it forms part of the east wall of Leap Year Glacier.

It was named by the New Zealand Geological Survey Antarctic Expedition (NZGSAE), 1967–1968, after Ian Stirling, a zoologist from the University of Canterbury at Scott Base in that season.

A peak located 3 nautical miles (5.6 km; 3.5 mi) northwest of Mount Stirling where the feature overlooks the heads of Leap Year and Champness Glaciers.

A peak, 2,175 metres (7,136 ft) high, standing at the east side of the terminus of Leap Year Glacier in the southeast extremity of the Bowers Mountains.

A conspicuous ridge-like mountain, 1,785 metres (5,856 ft) high, located just east of Mount Freed and Copperstain Ridge.

Named by US-ACAN for Captain Frank H. Radspinner, Jr., United States Army, commanding officer of the helicopter detachment that supported the USGS Topo East-West party that surveyed this area in 1962-63.