› Rivers & Lakes › South Dakota
River SD IA MN

Big Sioux River

South Dakota • 44.8894, -97.1190
Length
418 mi
673 km
Elevation
2,017′ → 1,071′
946 ft drop
Stream Order
7
Large River
Slope
0.04%
2.3 ft/mi
Drainage
6,534 mi²
16,922 km²
Avg Flow
1,316 cfs
1.8 mph velocity
Path to Mouth
4,351 mi
7,002 km to ocean
Classification
Tributary
Mid-reach
Elevation Profile
Data from USGS & NOAA for informational purposes only. More
Monitor

Water Level Gauges on Big Sioux River

There are 17 USGS water level monitoring stations on Big Sioux River providing real-time flow and stage data.

Access Sites on Big Sioux River

There are 32 boat ramps, launches, and public access points on Big Sioux River.