卡斯托冰原岛峰是南极洲的冰原岛峰，位于葛拉汉地的奥斯卡二世海岸，处于奥希阿纳冰原岛峰西南面6公里，在1893年12月由挪威探险队发现和绘入地图，现时由南极条约体系管理。

Castor Nunatak (65°10′S 59°55′W / 65.167°S 59.917°W / -65.167; -59.917) is a nunatak 3 nautical miles (6 km) southwest of Oceana Nunatak in the Seal Nunataks group, off the east coast of the Antarctic Peninsula. It was first seen and mapped as an island in December 1893 by a Norwegian Sealing expedition under C.A. Larsen, who named it after the Castor, a ship which combined sealing and exploring activities along the west coast of the Antarctic Peninsula under Captain Morten Pedersen in 1893–94. The feature was determined to be a nunatak in 1902 by the Swedish Antarctic Expedition under Otto Nordenskiöld.