Distributary of Ustay River, flows SE to the Alsek River 2 mi N of its mouth and 48 mi SE of Yakutat, Malaspina Coastal Plain.
Local descriptive name reported in 1927 by U.S. Geological Survey (USGS). Captain Tebenkov (1852, map 7), Imperial Russian Navy (IRN), shows five outlets of the Alsek River and one he recorded as "Kakangina Kakanhini," meaning "stickleback river." Lieutenant Commander J. F. Moser, U.S. Navy (USN), found the Alsek to have only three main outlets. Just west of these is the "Ko=kon=hee=ni" an outlet of the Ustay River. It is this latter application that is now called "Muddy."
Canyon Glacier, Fassett Glacier, Martin Glacier, Rodman Glacier,
Islands:Lakes:Akwe Lake, Square Lake, Tanis Lake, Ustay Lake,
Mountain Passes:Rapids:Rivers:Alsek River, East Alsek River, Taaltsug River, Tanis River, Tlegan River, Ustay River, Vankahini River,
Streams:Cannery Creek, Clear Creek, Emile Creek, Gines Creek, Muddy Creek, Shack Creek, Split Creek, Williams Creek,