River ID

South Fork Imnaha River

Idaho • 45.1096, -117.1508

Hydrography profile Updated Dec 30, 2025

Checking mapped path coverage…

USGS and NOAA data is for informational purposes. Source notes

Length

10 mi

15 km

Elevation

7,497′ → 5,332′

2,164 ft drop

Stream Order

Large River

Slope

4.28%

225.9 ft/mi

Drainage

28 mi²

72 km²

Avg Flow

-- cfs

1.4 mph velocity

Path to Mouth

598 mi

962 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