In its upper reaches, within Yellowstone Park and the mountains of Montana, it is a popular destination for fly fishing. In Montana, the river's waters have been used extensively for irrigation since the 1860s.
It flooded the fertile bottomlands of the Affiliated Tribes (Mandan, Arikara, Hidatsa), damaging their economy and reducing their ability to be self-sufficient. The latter is a reservoir formed in 1953 by the Garrison Dam, built on the Missouri River within the Fort Berthold Indian Reservation. It flows into the Missouri River near Buford, North Dakota just upstream from Lake Sakakawea. Farther downriver, it is joined by the Tongue near Miles City, and then by the Powder in eastern Montana. The river emerges from the mountains near the town of Livingston, where it turns eastward and northeastward, flowing across the northern Great Plains past the city of Billings.Įast of Billings, it is joined by the Bighorn River. After passing through the Black Canyon of the Yellowstone downstream of the Grand Canyon, the river flows northward into Montana between the northern Absaroka Range and the Gallatin Range in Paradise Valley. The Yellowstone River flows northward through Yellowstone National Park, feeding and draining Yellowstone Lake, then dropping over the Upper and Lower Yellowstone Falls at the head of the Grand Canyon of the Yellowstone within the confines of the park. The South Fork flows from the southern slopes of Thorofare Mountain. The North Fork, the larger of the two forks, flows from Younts Peak. The river starts where the North Fork and the South Fork of the Yellowstone River converge.
The river rises in northwestern Wyoming in the Absaroka Range, on the Continental Divide in southwestern Park County. However, the watershed contains five major reservoirs built on tributary rivers: Bull Lake, Boysen, Buffalo Bill, Big Horn, Tongue River, and Lake De Smet reservoirs. There are no storage dams located on the mainstem of the Yellowstone River. The area contains many lakes, including Yellowstone Lake. The watershed spans 34,167 square miles (88,490 km 2). At the headwaters, elevations exceed 12,800 feet (3,900 m) above sea level and descends to 1,850 feet (560 m) at the confluence with the Missouri River in far western North Dakota. The mainstem of the Yellowstone River is more than 700 miles (1,100 km) long. These rivers form tributaries to the Missouri River. The Yellowstone Basin watershed contains a system of rivers, including the Yellowstone River, and four tributary basins: the Clarks Fork Yellowstone, Wind River and Bighorn River, Tongue River, and Powder River. The Yellowstone River watershed is a river basin spanning 37,167 square miles (96,260 km 2) across Montana, with minor extensions into Wyoming and North Dakota, toward headwaters and terminus, respectively. It flows northeast to its confluence with the Missouri River on the North Dakota side of the border, about 25 miles west of present-day Williston.
Considered the principal tributary of upper Missouri, via its own tributaries it drains an area with headwaters across the mountains and high plains of southern Montana and northern Wyoming, and stretching east from the Rocky Mountains in the vicinity of Yellowstone National Park.
The Yellowstone River is a tributary of the Missouri River, approximately 692 miles (1,114 km) long, in the Western United States. Lamar River, Boulder River, Stillwater River, Big Horn River, Tongue River, Powder River
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