flows E to South Fork Fortymile River, 45 mi. SW of Eagle, Yukon- Tanana High. 20 miles long.
Named by prospectors and reported in 1896 by Spurr (1898, pl. 44), U.S. Geological Survey (USGS).
Dennison Fork, Mosquito Fork Fortymile River, Myers Fork, North Fork Fortymile River, South Fork Fortymile River,
Streams:Alder Creek, Atwater Creek, Buckskin Creek, Butte Creek, Chicken Creek, Dewey Creek, Eagle Creek, Forest Creek, Franklin Creek, Left Fork Chicken Creek, Liberty Creek, Lost Chicken Creek, Napoleon Creek, Soda Creek, Stonehouse Creek, Switch Creek, Tin Kettle Creek, Uhler Creek, Voss Creek, Wade Creek, Walker Fork, Wall Street Creek, Wilson Creek,