Located on the western side of Admiralty Gulf and a part of the Bonaparte Archipelago some 3.1 kilometres (2 mi) off-shore from the mainland, the island encompasses an area of 1,339 hectares (3,309 acres).

[1] The highest point of the island has an elevation of 134 metres (440 ft).

The island is rugged, composed of massive scree over deep jointed scarp country.

[2] It is part of the Osborn Island group which includes, Middle Osborn, Borda, Carlia, Steep Head and Kidney Island as well as West, North and Centre Rock.

[2] The traditional owners of the area are the Wunambal, whose name for the island is Umpatayi or Umbadayi.