flows E and SW to Caribou Creek, 51 mi. NE of Palmer, Talkeetna Mts.; 11 miles long.
Named in 1898 by Captain E. F. Glenn, USA, for his Indian guide "Billy."
Bench Lake, Bug Lake, Hicks Lake, Hundred Mile Lake, Index Lake,
Mountains:Lion Head, Mount Monarch, Strelshla Mountain,
Mountain Passes:Chitna Pass, Horsepasture Pass, Limestone Gap,
Peaks:Mountain Ranges:Ridges:Streams:Alfred Creek, Ammonite Creek, Billy Creek, Bitter Creek, Cadoceras Creek, Cardiceras Creek, Cardioceras Creek, Caribou Creek, Chitna Creek, Dan Creek, Divide Creek, Flume Creek, Fortress Creek, Glacier Creek, Glass Creek, Hicks Creek, Horsepasture Creek, Lake Creek, Mazuma Creek, Mouse Creek, Pinochle Creek, Rock Glacier Creek, Sheep Creek, Sladen Creek, Squaw Creek, West End Creek, Whistler Creek,
Valleys: