heads at junction of its North and South Forks, flows W to Yukon River, 18 mi. NE of Rampart, Yukon-Tanana High. 50 miles long.
Named by prospectors for "Mike" Hess, who discovered gold on this stream in 1892. The Indian name, according to Captain C. W. Raymond, USA, in 1869, was "Yokuchargut" (spelled by W. H. Dall, "Yukutzcharkat" (Yukokakat), meaning "mouth of the Yuko." Dall says that in 1866 Captain F. E. Ketchum called the stream "Whymper River" after his friend and companion "Frederick Whymper, artist of the (Western Union Telegraph) Expedition" (Dall, 1870, p. 25, 281).
Crescent Island, Kalka Island, Sightas Island,
Mountains:Ridges:Rivers:Streams:Alder Creek, Clinton Creek, Dawson Creek, Grouse Creek, Hess Creek, Isom Creek, Lynx Creek, McDermott Creek, Ninety-two Hunter Creek, Twentymile Creek, Union Creek, Whymper Creek, Willow Creek, Woodcamp Creek,
Valleys: