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United States Rivers

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Illinois River

StatesColorado
Length71.4 miles
Watershed Length*115 miles
MouthMichigan River Gulf of Mexico
GNIS170358

Tributaries

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Name Distance
from Mouth
(miles)
 Length
 (miles)
 Watershed
Length
(miles)
Jack Creek522020
Willow Creek422424
Watercourse ‐ ‐ ‐ Watershed

* Note: Watershed is mostly rivers/streams 15+ miles in length.


Data from United States Geological Survey