River WY

East Fork River

Wyoming • 42.7144, -109.5055

Hydrography profile Updated Dec 30, 2025

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USGS and NOAA data is for informational purposes. Source notes

Length

64 mi

103 km

Elevation

11,112′ → 6,910′

4,202 ft drop

Stream Order

Large River

Slope

1.24%

65.5 ft/mi

Drainage

421 mi²

1,090 km²

Avg Flow

-- cfs

1.4 mph velocity

Path to Mouth

3,382 mi

5,442 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