阿德默勒爾蒂山脈
Mortimer was the first to climb Annapurna II by its south face (1983), the first Australian to climb Antarctica's highest peak, Vinson Massif (1988), the first to climb Mount Minto in the Admiralty Mountains of Antarctica (1988) and, with Greg Child, one of the first two Australians to climb K2 (1990).