Mount Rolleston, Mountain summit in Arthur's Pass National Park, New Zealand.

Mount Rolleston is a 2,271 meter (7,451 feet) summit in the Southern Alps within Arthur's Pass National Park on New Zealand's South Island. The peak features several ridges and steep faces that form distinct climbing routes of varying difficulty.

The mountain was named in 1864 by surveyor Arthur Dudley Dobson after William Rolleston, who was Superintendent of Canterbury Province at that time. The region has been explored and climbed since the 19th century.

The mountain's Māori name, Te Tara o Tama, predates the 1864 survey name. Climbers today use the Rome and Goldney Ridges as the main routes, and the Goldney Ridge leads to the Otira Slide, which can be descended on skis in winter.

The best time to climb is in early morning hours, with most climbers departing from Arthur's Pass village around 4 AM to make full use of daylight. Proper planning and awareness of local conditions are important since weather can change quickly in the mountains.

Mount Rolleston was first climbed in 1912 by H. Thomson and J. Gilligan. The upper slopes feed several rivers, most notably the Waimakariri and tributaries of the Otira. The Māori name Te Tara o Tama predates the 1864 naming by surveyor Arthur Dudley Dobson.