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It rises in northwestern Wyoming near Younts Peak at the continental divide in southwestern Park County. It flows northward through Yellowstone National Park, feeding and draining Yellowstone Lake, then dropping through Yellowstone Falls and forming the Grand Canyon of the Yellowstone within the confines of the park. It flows northward into Montana through the Absaroka Range and 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.
East of Billings, it is joined by the Bighorn River. Further downriver, it is joined by the TongueThe Tongue River is a tributary of the Yellowstone, approximately 265 mi (426 km) long, in the U. states of Wyoming and Montana. It rises along the northern slope of the Bighorn Mountains in north central Wyoming and flows northeast, past the town of Sher near the town of Miles CityMiles City is a city located in Custer County, Montana. As of the 2000 census, the city had a total population of 8,487. It is the county seat of Custer County 6. Geography Miles City is located at 46°24'30" North, 105°50'24" West (46. 408460, -105. Accor, and then by the PowderThe Powder River is a a tributary of the Yellowstone River, approximately 375 mi (603 km) long in the southeastern Montana and northeastern Wyoming in the United States. It drains an area historically known as the Powder River Country on the high plains e in eastern Montana. It joins the Missouri in extreme western North DakotaNorth Dakota ( In Detail) ( In Detail) State nicknames: Peace Garden State ''Roughrider State ''Flickertail State Other U. States Capital Bismarck Largest City Fargo Governor John Hoeven Area Total Land Water % water Ranked 19th 183,272 kmē 178,839 kmē 4,, upriver from the town of WillistonWilliston is a city located in Williams County, North Dakota. As of the 2000 census, the city had a total population of 12,512. It is the county seat of Williams County 6. The local paper is the Williston Herald''. Sloulin Field International Airport serv at the Lake SakakaweaLake Sakakawea is a reservoir on the Missouri River. It is the third largest man-made lake in the United States. Of man-made reservoirs in the USA, only Lake Mead and Lake Powell are larger. It is located about 80 km (50 mi) from Bismarck, North Dakota; t reservoir, with the lower 20 mi (32 km) of the river forming a narrow arm of the reservoir. At the confluence with the Missouri, the Yellowstone is actually the larger river.
The river was explored in 1806Events January 8 Cape Colony becomes a British colony January 10 Dutch in Cape Town surrender to the British January 19 The United Kingdom occupies the Cape of Good Hope March 23 After traveling through the Louisiana Purchase and reaching the Pacific Ocea by William Clark, during the return voyage of the Lewis and Clark Expedition. It was an important artery of transportation for Native Americans as well as for white settlers by riverboat in the 19th century. In Montana, it has been used extensively for irrigation since the 1860s. In its upper reaches, within Yellowstone Park and the mountains of Montana, it is a popular destination for fly fishing.