Mawson Peak is an active volcanic mountain on Heard Island, an external Australian territory in the Southern Ocean. With its summit at 2,745 metres (9,006 ft), it is the second highest peak in any state or territory of Australia, higher than the 2,228-metre Mount Kosciuszko, and surpassed only by the 3,490 metres (11,450 ft) Mount McClintock in the Britannia Range in Australian Antarctic Territory.