on Portage Mtn., W coast of Lindenberg Peninsula, Kupreanof I., 12 mi. NW of Petersburg, Alex. Arch.
Named in 1887 by Lieutenant Commander C. M. Thomas, U.S. Navy (USN).
Castle Islands, Portage Islands,
Bars:Bays:Bains Cove, Cape Strait, Dry Bay, Dry Cove, Goose Cove, McDonald Arm, North Arm Duncan Canal, Portage Bay, Towers Arm,
Capes:Boulder Point, East Point, Flat Point, Goose Point, Hook Point, Indian Point, Lindenberg Peninsula, West Point,
Channels:Islands:Big Castle Island, Cloverleaf Island, High Castle Island, Rookery Island, Stop Island,
Lakes:Colp Lake, Petersburg Lake, Salt Chuck,
Mountains:Ambler Peak, Chipp Peak, De Long Peak, Del Monte Peak, Duncan Peaks, Hall Peak, Hunt Peak, Kane Peak, Kupreanof Mountain, Lockwood Peak, Portage Mountain, Putnam Peak, Scott Peak, Sheridan Peak, Sherman Peak,
Mountain Passes:Mitchell Slough, Ohmer Slough,
Mountain Ranges:Rivers:Streams:Coho Creek, Duncan Creek, Middle Creek, Taylor Creek, Twelvemile Creek,
Routes:Duncan Canal Portage, Petersburg Trail, Portage Mountain Loop Trail,