Semidi Islands

The Semidi Islands are a remote group of islands in the Gulf of Alaska off the southwestern coast of the Alaska Peninsula. They are notable for dense seabird colonies and marine mammal haul-outs rather than human habitation.

A few organized wildlife cruises and research vessels visit the islands to observe large seabird colonies, sea lions, seals, and other marine life. There are no visitor facilities on the islands and landing is uncommon, so most observation is from boats.

The islands have seen little permanent human settlement and are primarily valued for their wildlife. They have been included in Alaska’s network of protected maritime areas used for seabird and marine-mammal conservation.

Situated in the eastern North Pacific off Alaska’s south-central coast, the Semidi Islands lie southwest of the Alaska Peninsula and are part of Alaska’s maritime island groups.

• Access: Access is by boat or chartered vessel; there are no road connections and no permanent settlements on the islands.
• Wildlife: Important habitat for seabirds and marine mammals, so most visits are by wildlife observers or researchers rather than general tourism.