Illinois River

Info / Counties: Brown, Bureau, Calhoun Aux, Cass, Fulton, Greene, Grundy, Jersey Aux, LaSalle, Marshall, Mason, Morgan, Peoria, Pike Aux2, Putnam, Schuyler, Scott, Tazewell, Woodford

Location 41526 acres

Recent Stocking History
2025 Northern Pike Fingerling (1 - 3") 2481

Contact

McClelland, Nerissa
IDNR Fisheries Biologist
Send Message
309-357-0387

Description

Illinois River Fishing Guide

The slow-moving Illinois River, which twists 273 miles through the heart of the state before joining the Mississippi River 14 miles upstream from Alton, has shown an improved fishery since the late 1970s, and anglers have made fine catches of Sauger and Walleyes, White Bass, Channel Catfish, Largemouth Bass and panfish from both the main stream and backwaters.

Forming at the junction of the Kankakee and Des Plaines Rivers in the northeastern part of the state, the Illinois and its backwaters provide some 87,000 surface acres. There are five dams on the Illinois River besides the one on the Mississippi at Alton in which pool the lower 80 miles of the Illinois is included. The depth of the river is regulated for navigation purposes by this series of locks and dams. Each section of the river between dams is called a navigation pool. The pools are given the name of the dam, which controls the water level of the pool, that is, the dam that is immediately downstream from the pool.

Additional Information

Illinois River Pools

  • Lockport: Lockport extends from the Lockport Lock & Dam located near Lockport, Illinois, upstream to the Chicago Harbor Lock, in Chicago, Illinois.
  • Brandon: Brandon extends from the Brandon Lock & Dam located within Rockdale and Joliet, Illinois, upstream to the Lockport Lock & Dam located near Lockport, Illinois.
  • Dresden: Dresden extends from the Dresden Lock & Dam located south of Channahon, Illinois, upstream to the Brandon Lock & Dam, in Rockdale and Joliet, Illinois.
  • Marseilles:Marseilles extends from the Marseilles Lock located near Marseilles, Illinois, upstream to the Dresden Lock & Dam located south of Channahon, Illinois.
  • Starved Rock: Starved Rock extends from the Starved Rock Lock & Dam located near Utica, Illinois, upstream to the Marseilles lock located near Marseilles, Illinois.
  • Peoria: Peoria extends from the Peoria Lock & Dam located near Peoria, Illinois, upstream to the Starved Rock Lock & Dam located near Utica, Illinois.
  • La Grange: La Grange extends from the La Grange Lock & Dam located south of Beardstown, Illinois, upstream to Peoria Lock & Dam located near Peoria, Illinois.
  • Alton: Alton is used to describe the un-impounded portion of the Illinois River. It extends from the Mississippi River upstream to the La Grange Lock & Dam south of Beardstown, Illinois.

Other

Illinois River Map Illinois River Map