Mount Terra Nova is a snow-covered mountain, 2,130 metres (6,990 ft) high, between Mount Erebus and Mount Terror on Ross Island in Antarctica. It was first mapped by the British National Antarctic Expedition (BrNAE) 1901–04, and named for the Terra Nova, relief ship for this expedition and the British Antarctic Expedition, 1910–13.

Mount Erebus is the second-highest volcano in Antarctica, the highest active volcano in Antarctica, and the southernmost active volcano on Earth. It is the sixth-highest peak of an island and the second most prominent mountain in Antarctica after Mount Vinson. It has a summit elevation of 3,794 metres (12,448 ft). It is located in the Ross Dependency on Ross Island, which is also home to three inactive volcanoes: Mount Terror, Mount Bird, and Mount Terra Nova. The mountain was named by Captain James Clark Ross in 1841 for his ship, the Erebus.