Little Bighorn River

Last Updated: May 3, 2026

Total streamflow across the Little Bighorn River was last observed at 322 cfs, and is expected to yield approximately 639 acre-ft of water today; about 59% of normal. River levels are low and may signify a drought. Average streamflow for this time of year is 543 cfs, with recent peaks last observed on 2019-12-01 when daily discharge volume was observed at 5,766 cfs.

Maximum discharge along the river is currently at the Little Bighorn River Near Hardin Mt reporting a streamflow rate of 210 cfs. This is also the highest stage along the Little Bighorn River, with a gauge stage of 2.97 ft at this location. This river is monitored from 2 different streamgauging stations along the Little Bighorn River, the highest being situated at an altitude of 4,332 ft, the Little Bighorn River At State Line Nr Wyola Mt.

The Little Bighorn River is a 138-mile-long tributary of the Bighorn River in Montana and Wyoming.


15-Day Long Term Forecast


River Details

Last Updated 2026-05-03
Discharge Volume 639 ACRE-FT
Streamflow 322.0 cfs
Past 24 Hours: +3.0 cfs (+0.94%)
Percent of Normal 59.28%
Maximum 5,765.5 cfs
2019-12-01
Seasonal Avg 543 cfs
       
River Streamflow Levels
Streamgauge Streamflow Gauge Stage 24hr Change (%) % Normal Minimum (cfs) Maximum (cfs) Air Temp Elevation
Little Bighorn River At State Line Nr Wyola Mt
USGS 06289000
112 cfs 2.22 ft 5.66
Little Bighorn River Near Hardin Mt
USGS 06294000
210 cfs 2.97 ft -1.41
Seasonal Discharge Comparison
Maximum Streamflow Discharge
Streamflow Elevation Profile

The Little Bighorn River is a 138-mile-long (222 km) tributary of the Bighorn River in the United States in the states of Montana and Wyoming. The Battle of the Little Bighorn, also known as the Battle of the Greasy Grass, was fought on its banks on June 25–26, 1876, as well as the Battle of Crow Agency in 1887.