River WA

North Fork Green River

Washington • 47.3065, -121.7307

Reviewed mapped path Updated Dec 30, 2025

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USGS and NOAA data is for informational purposes. Source notes

Length

12 mi

19 km

Elevation

3,720′ → 1,167′

2,554 ft drop

Stream Order

Medium River

Slope

4.07%

215.1 ft/mi

Drainage

26 mi²

67 km²

Avg Flow

-- cfs

1.1 mph velocity

Path to Mouth

78 mi

125 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