Total streamflow across the Yellowstone River was last observed at 30,288 cfs, and is expected to yield approximately 60,076 acre-ft of water today; about 107% of normal. Average streamflow for this time of year is 28,289 cfs, with recent peaks last observed on 2011-05-25 when daily discharge volume was observed at 448,060 cfs.

Maximum discharge along the river is currently at the Yellowstone River Near Sidney Mt reporting a streamflow rate of 6,470 cfs. However, the streamgauge with the highest stage along the river is the Yellowstone River At Glendive Mt with a gauge stage of 43.14 ft. This river is monitored from 9 different streamgauging stations along the Yellowstone River, the highest being situated at an altitude of 7,731 ft, the Yellowstone River At Yellowstone Lk Outlet Ynp.

The Yellowstone River is a major tributary of the Missouri River, spanning 692 miles from its source in Wyoming to its mouth in North Dakota. The river played a significant role in the history of the American West, including the Lewis and Clark expedition. It also served as a major transportation route for fur traders and settlers. The river is fed by snowmelt and precipitation, with the highest flows occurring in the spring and early summer. The river has several reservoirs, including the Buffalo Bill, Yellowtail, and Fort Peck dams. These provide hydroelectric power, irrigation, and flood control. Recreational activities, such as fishing, boating, and camping, are popular along the river. The river also supports agricultural activities, including cattle grazing and crop irrigation.