River OR WA

Umatilla River

Oregon • 45.9145, -119.3485

Length

89 mi

144 km

Elevation

2,329′ → 266′

2,063 ft drop

Stream Order

7

Large River

Slope

0.44%

23.1 ft/mi

Drainage

2,117 mi²

5,483 km²

Avg Flow

809 cfs

2.5 mph velocity

Path to Mouth

377 mi

607 km to ocean

Classification

Tributary

Mid-reach

Elevation Profile

Data from USGS & NOAA for informational purposes only. More

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