flows SE to Mosquito Fork, 58 mi. SW of Eagle, Yukon-Tanana High.
Local name reported in 1956 by U.S. Geological Survey (USGS).
Middle Fork Fortymile River, Middle Fork North Fork Fortymile River,
Streams:Anaconda Creek, Bullion Creek, Bullion Creek, Caribou Creek, Confederate Creek, Gold Creek, Montana Creek, Moose Creek, Moose Creek, Old Man Creek, Porphyry Creek, Sleem Creek, Tomato Creek, Willow Creek,
Valleys: