River CA

Colusa Trough

California • 39.2289, -122.0616

Hydrography profile Updated Dec 30, 2025

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USGS and NOAA data is for informational purposes. Source notes

Length

27 mi

44 km

Elevation

61′ → 35′

26 ft drop

Stream Order

Large River

Slope

0.02%

1.0 ft/mi

Drainage

11,340 mi²

29,371 km²

Avg Flow

-- cfs

1.4 mph velocity

Path to Mouth

140 mi

225 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