River SD

North Fork Elkhorn River

South Dakota • 42.5370, -97.5089

Hydrography profile Updated Dec 30, 2025

Checking mapped path coverage…

USGS and NOAA data is for informational purposes. Source notes

Length

81 mi

131 km

Elevation

1,887′ → 1,490′

397 ft drop

Stream Order

Large River

Slope

0.09%

4.9 ft/mi

Drainage

789 mi²

2,044 km²

Avg Flow

-- cfs

1.4 mph velocity

Path to Mouth

3,937 mi

6,336 km to ocean

Classification

Tributary

Mid-reach

Elevation Profile

Water Quality

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

Data from USGS & NOAA for informational purposes only. More

Access Sites on North Fork Elkhorn River

There are 1 boat ramps, launches, and public access points on North Fork Elkhorn River.