River IL

East Fork Spoon River

Illinois • 41.2137, -89.7226

Reviewed mapped path Updated Dec 30, 2025

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USGS and NOAA data is for informational purposes. Source notes

Length

24 mi

38 km

Elevation

838′ → 659′

178 ft drop

Stream Order

Medium River

Slope

0.14%

7.6 ft/mi

Drainage

95 mi²

246 km²

Avg Flow

-- cfs

1.1 mph velocity

Path to Mouth

1,488 mi

2,395 km to ocean

Classification

Tributary

Mid-reach

Elevation Profile

Water Quality

Data from EPA Water Quality Portal (USGS, EPA, state agencies).

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Data from USGS & NOAA for informational purposes only. Read source and safety notes

Rain Radar