heads at junction of Mosquito and Dennison Forks, flows N to join North Fork to form Fortymile River, 42 mi. SW of Eagle, Yukon-Tanana High.
Named by prospectors and reported i1896 by Spurr (1898, pl. 38), U.S. Geological Survey (USGS). This name was probably in use as early as 1886.
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, 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,