Mount Twynam, mountain summit in Kosciuszko National Park, New South Wales, Australia

Mount Twynam is a rounded mountain on the Main Range of the Snowy Mountains in New South Wales, 8 kilometres north-east of Mount Kosciuszko. At 2,195 metres it is mainland Australia's third-highest peak, with far-reaching views over Blue Lake Cirque and the Western Falls.

The mountain was surveyed during the colonial period and has maintained its ranking as the third-highest mainland peak in Australia. Accurate mapping of this high country was an important aspect of early European exploration.

The name Twynam honours a colonial surveyor, and the peak sits on the Main Range route that walkers have used since the 1800s to cross between the Snowy River and Geehi valleys. Its rounded, eroded crest is a landmark for those following the ridge toward Mount Kosciuszko.

Visitors access the summit via marked trails through Kosciuszko National Park, with the most favorable conditions during summer months. Proper preparation and equipment are important since conditions at elevation can change quickly.

Mount Twynam is the third-highest peak on mainland Australia at 2,195 m, yet it is rarely visited despite being reachable by track. It stands 8 km north-east of Mount Kosciuszko, and its rounded, eroded summit gives wide views over Blue Lake Cirque and the Western Falls.