Total streamflow across the Little Bighorn River was last observed at 198 cfs, and is expected to yield approximately 393 acre-ft of water today; about 80% of normal. Average streamflow for this time of year is 247 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 125 cfs. This is also the highest stage along the Little Bighorn River, with a gauge stage of 3.25 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. The river is most well-known for its significance in Native American history as the site of the Battle of Little Bighorn in 1876. The river originates in Wyoming's Bighorn Mountains and flows into Montana, where it joins the Bighorn River. The Little Bighorn River is fed by several tributaries, including the Nowood River and the Crazy Woman Creek. There are no dams or reservoirs on the Little Bighorn River, but there are several irrigation diversions for agriculture. The river is also popular for recreational activities, such as fishing, boating, and camping.