River CA

San Gabriel River

California • 34.1398, -117.9039

Hydrography profile Updated Jan 19, 2026

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USGS and NOAA data is for informational purposes. Source notes

Length

60 mi

97 km

Elevation

4,430′ → 5′

4,425 ft drop

Stream Order

Large River

Slope

1.39%

73.3 ft/mi

Drainage

1,878 mi²

4,864 km²

Avg Flow

362 cfs

2.1 mph velocity

Path to Mouth

60 mi

96 km to ocean

Classification

Terminal

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