Mount Menzies in the context of Robert Menzies

The Territory of Heard Island and McDonald Islands (HIMI) is an Australian external territory comprising a volcanic group of mostly barren Antarctic islands, about two-thirds of the way from Madagascar to Antarctica. The group's overall land area is 372 km (144 sq mi) and it has 101.9 km (63 mi) of coastline. Discovered in the mid-19th century, the islands lie on the Kerguelen Plateau in the southern Indian Ocean and have been an Australian territory since 1947.

Heard Island and McDonald Islands contain Australia's only two active volcanoes. The summit of one, Mawson Peak, is higher than any mountain in all other Australian states, territories or claimed territories, except Dome Argus, Mount McClintock and Mount Menzies in the Australian Antarctic Territory. This Antarctic territory is a land claim unrecognised by most other countries, meaning that Mawson Peak is the highest mountain with undisputed Australian sovereignty.

Mawson Peak is an active volcanic summit of the Big Ben massif on Heard Island, an external Australian territory in the Indian Ocean.

With an elevation of 2,745 metres (9,006 ft), it is the third highest peak in any state, territory or claimed territory of Australia, higher than the 2,228-metre (7,310 ft) Mount Kosciuszko, and surpassed only by the 3,490-metre (11,450 ft) Mount McClintock and the 3,355-metre (11,007 ft) Mount Menzies in the Australian Antarctic Territory. The Australian Antarctic Territory is a territorial claim unrecognised by most other countries, meaning that Mawson Peak is the highest mountain over which Australia has true sovereignty. The peak erupts fairly frequently, and as recently as May 2023. Mawson Peak is ranked the 30th of Earth's most topographically isolated summits.