one of Castle Is., in Duncan Canal, 13 mi. SW of Petersburg, on S coast of Kupreanof I., Alex. Arch. 0.6 mile long.
Local name reported in 1933 by R. H. Sargent, U.S. Geological Survey (USGS), so named because "the outline of this island suggests a clover leaf."
Castle Islands, Level Islands,
Bars:Burnt Island Reef, Coply Reef, Midway Rock, South Ledge, Spike Rock,
Bays:Bains Cove, Douglas Bay, Hoagies Hole, Kah Sheets Bay, Krauses Hole, Little Duncan Bay, Long Pond, McDonald Arm, North Arm Duncan Canal, Scow Bay, Towers Arm,
Capes:Point Humbug, Point Lockwood, Bayou Point, Blunt Point, Boulder Point, December Point, Deception Point, Goose Point, Green Point, Hicks Point, Hood Point, Indian Point, Inlet Point, Lindenberg Peninsula, Mountain Point, No Thorofare Point, North Point, Turn Point,
Channels:Beecher Pass, Duncan Canal, Keene Channel, Petersburg Bar Range, Whiskey Pass,
Cities:Flats:Islands:Battery Islets, Big Castle Island, Big Level Island, Big Saltery Island, Blowdown Island, Burnt Island, Butterworth Island, Christmas Island, Cloverleaf Island, Emily Island, Fair Island, Foremost Rock, Grief Island, High Castle Island, Jewell Island, Kah Sheets Island, Keene Island, Little Level Island, Little Saltery Island, Lung Island, Moss Island, Pearl Island, Point Lockwood Rock, Rookery Island, White Rock, Woewodski Island,
Lakes:Colp Lake, Green Rocks Lake, Harrys Lake, Harvey Lake, Kah Sheets Lake, Petersburg Lake, Salt Chuck,
Mountains:Del Monte Peak, Duncan Peaks, Narrows Peak, Petersburg Mountain, Portage Mountain,
Parks:Beecher Pass State Marine Park,
Mountain Passes:Mitchell Slough, Ohmer Slough,
Rivers:Streams:Coho Creek, Duncan Creek, Fivemile Creek, Kah Sheets Creek, Middle Creek, Petersburg Creek, Spirit Creek, Taylor Creek,
Cities:Routes:Colp Lake Trail, Duncan Canal Portage, Harvey Lake Trail, Kah Sheets Trail, Petersburg Lake Trail, Petersburg Trail, Portage Mountain Loop Trail,
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