Located on Althorp Peninsula, on N coast of Chichagof Island, 34 mi. WNW of Hoonah, Alex. Arch.
Named in 1955 by U.S. Geological Survey (USGS), for Port Althorp.
The Hobbit Hole, Port Althorp, Bingham Cove, Cross Sound, Deer Harbor, Earl Cove, Elfin Cove, Granite Cove, Greentop Harbor, Gull Cove, Hoktaheen Cove, Idaho Inlet, Inian Cove, Lacy Cove, Lisianski Inlet, Mite Cove, Mosquito Cove, Pelican Harbor, Salt Chuck Bay, Soapstone Cove, Squid Bay, Stag Bay, Surge Bay, Takanis Bay,
Althorp Rock, Gaff Rock, Gauntlet Island, George Island, Inian Island, Junction Island, Mindalina Island, Miner Island, Mite Island, Shaw Island, Shaw Islands, Three Hill Island, White Crag Island, Yakobi Island, Yakobi Rock,
Mount Althorp, Apex Mountain, Basalt Knob, Bingham Peak, Crag Mountain, Craig Mountain, Cub Mountain, Mount Hill, El Nido Peak, Pinnacle Peak, Mount Raatikainen, Takanis Peak, Tarn Mountain, Vein Mountain, Wedge Mountain, Yakobi Peak,