3 mi. NE of Rude River delta, 12 mi. NE of Cordova, in the Chugach Mountains.
Local name reported in 1908 by Grant and Higgins (U.S. Geological Survey (USGS) Bulletin 443, plates 1&2, 1910).
Eyak,
Bars:Bays:Capes:Channels:Dams:Eyak Lake Dam, Humpback Creek Number 1 Dam, Humpback Creek Number 2 Dam, Humpback Creek Number 3 Dam,
Glaciers:Cordova Glacier, Glacier G214282E60871N, Glacier G214285E60829N, Glacier G214286E60849N, Glacier G214289E60837N, Glacier G214291E60861N, Glacier G214364E60797N, Shephard Glacier,
Islands:Boy Scout Island, Mavis Island, North Island,
Lakes:Beaver Lake, Cabin Lake, Corser Lake, Crater Lake, Eleanor Lake, Lake Elsner, Eyak Lake, Ibeck Pond, Island Lake, Meeks Pond, Middle Lake, Middle Lake, Rude Lake, Scott Lake, Scout Lake, Sellen Lake, Siamese Lakes,
Mountains:Mount Eccles, Mount Eyak, Kelly Mountain, Pontoon, Mount Shiels, Snyder Mountain, Tripod Hill,
Mountain Passes:Center Slough, Joe Reeves Slough,
Rivers:Eyak River, Glacier River, Rude River,
Streams:Beartrail Creek, Currin Slough, Government Slough, Humpback Creek, Ibeck Creek, Lydick Slough, Parson Falls Creek, Power Creek, Robinson Falls Creek, Snyder Falls Creek, Wesley Falls Creek,
Routes:Eyak Trail, Lake Elsner Trail, Sheridan Mountain Trail,
Cities:Waterfalls: