at head of North Arm Duncan Canal, on Kupreanof I., Alex. Arch.
Local name recorded in 1951 by U.S. Geological Survey (USGS). See Salt Chuck, village.
Castle Islands, Portage Islands,
Bars:Bays:Dry Cove, Goose Cove, McDonald Arm, North Arm Duncan Canal, Portage Bay, Towers Arm,
Capes:Boulder Point, East Point, Flat Point, Goose Point, Grand Point, Hook Point, Indian Point, Lindenberg Peninsula, West Point,
Islands:Big Castle Island, Cloverleaf Island, High Castle Island, Kupreanof Island, Rookery Island, Stop Island,
Lakes:Irish Lakes, Petersburg Lake, Salt Chuck, Towers Lake,
Mountains:Ambler Peak, Chipp Peak, De Long Peak, Duncan Peaks, Hall Peak, Hunt Peak, Kane Peak, Kupreanof Mountain, Lockwood Peak, Portage Mountain, Putnam Peak,
Mountain Passes:Mitchell Slough, Ohmer Slough,
Mountain Ranges:Bohemian Range, Missionary Range,
Streams:Routes: