Easternmost of three bays at rhe head of Duncan Canal on Kupreanof Island, 11 mi. E of Petersburg, Alexander Arch.
HistoryLocal name recorded in 1951 by U.S. Geological Survey (USGS).
Bains Cove, Cape Strait, Dry Cove, Goose Cove, Little Duncan Bay, 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, Emily Island, Fair Island, Grief Island, High Castle Island, Pearl Island, Rookery Island, Stop Island,
Lakes:Mountains:Ambler Peak, Chipp Peak, De Long Peak, Duncan Peaks, Hall Peak, Hunt Peak, Kane Peak, Kupreanof Mountain, Lockwood Peak, Portage Mountain, Putnam Peak, Sherman Peak,
Mountain Passes:Mitchell Slough, Ohmer Slough,
Mountain Ranges:Bohemian Range, Missionary Range,
Rivers:Streams:Duncan Creek, Middle Creek, Taylor Creek, Twelvemile Creek,
Routes:Duncan Canal Portage, Petersburg Trail, Portage Mountain Loop Trail,