River CO

South Fork Williams Fork

Colorado • 40.1941, -107.4318

Reviewed mapped path Updated Dec 30, 2025

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USGS and NOAA data is for informational purposes. Source notes

Length

20 mi

32 km

Elevation

10,273′ → 6,558′

3,716 ft drop

Stream Order

Large River

Slope

3.57%

188.3 ft/mi

Drainage

103 mi²

266 km²

Avg Flow

-- cfs

1.4 mph velocity

Path to Mouth

2,491 mi

4,008 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