They were mapped from air photos and surveys by the Sixth Norwegian Antarctic Expedition, 1956–1960 (NorAE), and named Eidshaugane (the isthmus hills).

Mountain, 1,880 metres (6,170 ft) high, forming the east end of the Eidshaugane Peaks.

Mapped from air photos and surveys by NorAE, 1956–1960, and named Eidsgavlen (the isthmus gable).

A mountain, 1,970 metres (6,460 ft) high, standing 1 mile (1.6 km) east-southeast of Eidsgavlen Cliff.

A prominent col situated 3.5 nautical miles (6.5 km; 4.0 mi) west of Eidshaugane Peaks in the central Humboldt Mountains.

Mapped by Norway from air photos and surveys by NorAE, 1956–1960, and named Storeidet (the great isthmus).