Little Missouri River

Last Updated: May 3, 2026

Total streamflow across the Little Missouri River was last observed at 222 cfs, and is expected to yield approximately 440 acre-ft of water today; about 11% of normal. River levels are low and may signify a drought. Average streamflow for this time of year is 2,051 cfs, with recent peaks last observed on 2011-05-26 when daily discharge volume was observed at 85,700 cfs.

Maximum discharge along the river is currently at the Little Missouri River Nr Watford City reporting a streamflow rate of 72.7 cfs. This is also the highest stage along the Little Missouri River, with a gauge stage of 7.31 ft at this location. This river is monitored from 4 different streamgauging stations along the Little Missouri River, the highest being situated at an altitude of 2,691 ft, the Little Missouri River At Marmarth.

The Little Missouri River is a tributary of the Missouri River that stretches 560 miles through Wyoming, South Dakota, and North Dakota.


15-Day Long Term Forecast


River Details

Last Updated 2026-05-03
Discharge Volume 440 ACRE-FT
Streamflow 221.8 cfs
Past 24 Hours: -19.7 cfs (-8.16%)
Percent of Normal 10.81%
Maximum 85,700.0 cfs
2011-05-26
Seasonal Avg 2,051 cfs
       
River Streamflow Levels
Streamgauge Streamflow Gauge Stage 24hr Change (%) % Normal Minimum (cfs) Maximum (cfs) Air Temp Elevation
Little Missouri River At Marmarth
USGS 06335500
18 cfs 0.94 ft -28.24
Little Missouri River At Medora
USGS 06336000
65 cfs 1.62 ft -6.39
Little Missouri River Nr Watford City
USGS 06337000
73 cfs 7.31 ft 23.64
Little Missouri River Near Langley
USGS 07360200
66 cfs 3.74 ft -24.92
Seasonal Discharge Comparison
Maximum Streamflow Discharge
Streamflow Elevation Profile

The Little Missouri River, or Little Mo, is a 147-mile-long (237 km) waterway that runs from the Ouachita Mountains of southwest Arkansas into the rolling hills area in the surrounding countryside.