River CA

Middle Fork Mokelumne River

California • 38.3882, -120.4291

Reviewed mapped path Updated Dec 30, 2025

Checking mapped path coverage…

USGS and NOAA data is for informational purposes. Source notes

Length

29 mi

47 km

Elevation

6,956′ → 915′

6,041 ft drop

Stream Order

Large River

Slope

3.91%

206.6 ft/mi

Drainage

155 mi²

403 km²

Avg Flow

-- cfs

1.8 mph velocity

Path to Mouth

138 mi

222 km to ocean

Classification

Tributary

Mid-reach

Elevation Profile

Water Quality

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

Detailed hydrology

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