In Muir Inlet, 3 mi N of Wachusett Inlet.
Named for the U.S. Coast and Geodetic Survey (USC&GS) vessel Westdahl which was engaged in charting Muir Inleet in 1933 and 1940.
Adams Inlet, Goose Cove, Hunter Cove, Maquinna Cove, Muir Inlet, Nunatak Cove, Stump Cove, Tidal Inlet, Wachusett Inlet,
Capes:Point McLeod, Point George, Caroline Point, Muir Point, Rowlee Point, Westdahl Point, Wolf Point,
Glaciers:Andrews Glacier, Aurel Glacier, Burroughs Glacier, Dirt Glacier, Dying Glacier (historical), McBride Glacier, Morse Glacier, Patton Glacier, Plateau Glacier, Riggs Glacier, White Glacier,
Hills:Curtis Hills, Klotz Hills, Knob I,
Islands:Garforth Island, Sealers Island,
Mountains:Black Mountain, Mount Brock, Mount Cadell, Mount Case, Coleman Peak, Mount Kloh Kutz, Knob G, Knob H, The Nunatak, Pyramid Peak, Red Mountain, Sitth-gha-ee Peak, Mount Wright,
Mountain Passes:Ridges:Bruce Hills, Idaho Ridge, McConnell Ridge, Minnesota Ridge, Oberlin Ridge, Van Horn Ridge, White Thunder Ridge,
Streams:Valleys: