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Illinois River
River
The Illinois River is a principal tributary of the Mississippi River at approximately 273 miles in length. Located in the U.S. state of Illinois, the river has a drainage basin of 28,756.6 square miles.
Weather at Illinois River
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Frequently asked questions
- Where is Illinois River?
- Illinois River is a river in Illinois.
- Can you swim at Illinois River?
- There is no fixed answer for Illinois River: whether it is safe to swim there on a given day depends on the water temperature, recent rainfall, and any advisories posted at Illinois River in Illinois. Check current water conditions before you go, and follow posted signs and local guidance.
- How is Illinois River rated?
- Illinois River in Illinois has an average visitor rating of 4.5 out of 5, based on 342 reviews.
Visitor Reviews
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Best Times to Visit
- ›Check water levels and current conditions before visiting
- ›Wear life jackets when on the water
- ›Be aware of rapids and potential hazards
- ›Respect private property along riverbanks
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