River CA

Mad River

California • 40.4510, -123.5261

Hydrography profile Updated Dec 30, 2025

Checking mapped path coverage…

USGS and NOAA data is for informational purposes. Source notes

Length

114 mi

184 km

Elevation

4,713′ → 4′

4,709 ft drop

Stream Order

Large River

Slope

0.78%

41.3 ft/mi

Drainage

494 mi²

1,281 km²

Avg Flow

-- cfs

1.8 mph velocity

Path to Mouth

114 mi

183 km to ocean

Classification

Tributary

Mid-reach

Elevation Profile

Water Quality

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

Loading the interactive map…

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

Rain Radar