Fox River (Illinois River tributary)

Fox River
The Fox River near South Elgin, Illinois
Fox River and its watershed
Location
CountryUnited States
StatesWisconsin, Illinois
Physical characteristics
Source 
 • location1 mi (1.6 km) southeast of Colgate, Wisconsin
 • coordinates43°11′09″N 88°11′42″W / 43.18583°N 88.19500°W / 43.18583; -88.19500
 • elevation942.78 ft (287.36 m)
Mouth 
 • location
Illinois River at Ottawa, Illinois
 • coordinates
41°20′37″N 88°50′26″W / 41.34361°N 88.84056°W / 41.34361; -88.84056
 • elevation
460.28 ft (140.29 m)
Length202 mi (325 km)
Discharge 
 • locationmouth
 • average2,346.01 cu ft/s (66.432 m3/s) (estimate)
Basin features
ProgressionFox River → IllinoisMississippiGulf of Mexico
River systemMississippi River
Tributaries 
 • leftPoplar Creek, Morgan Creek
 • rightNippersink Creek, Tyler Creek, Ferson Creek, Big Rock Creek, Indian Creek
WaterbodiesChain O'Lakes

The Fox River is a 202-mile-long (325 km) tributary of the Illinois River, flowing from southeastern Wisconsin to Ottawa, Illinois in the United States. The Wisconsin section was known as the Pishtaka River in the 19th century. There is another Fox River in Wisconsin that flows through Lake Winnebago into Green Bay. There are also two other "Fox Rivers" in southern Illinois: the Fox River (Little Wabash tributary) and a smaller "Fox River" that joins the Wabash River near New Harmony, Indiana.

The Fox River (Illinois River tributary) is known locally as an excellent fishery with opportunities for smallmouth bass, flathead catfish, and walleye. The river’s watershed encompasses 1,720 square miles (4,500 km2) in Illinois and 938 square miles (2,430 km2) in Wisconsin.