The Pribilof Islands are a group of four volcanic islands off the coast of mainland Alaska, in the Bering Sea, about 200 miles north of Unalaska and 200 miles southwest of Cape Newenham. The islands are part of the Alaska Maritime National Wildlife Refuge. The Siberian coast is roughly 500 miles northwest. About 77 square miles in total area, they are m…The Pribilof Islands are a group of four volcanic islands off the coast of mainland Alaska, in the Bering Sea, about 200 miles north of Unalaska and 200 miles southwest of Cape Newenham. The islands are part of the Alaska Maritime National Wildlife Refuge. The Siberian coast is roughly 500 miles northwest. About 77 square miles in total area, they are mostly rocky and are covered with tundra, with a population of 572 as of the 2010 census.