Yellowstone River in the Fall

The Yellowstone River is a tributary of the Missouri River, approximately 671 miles long, in the Western United States. 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 Mountain…
The Yellowstone River is a tributary of the Missouri River, approximately 671 miles long, in the Western United States. 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. It flows northeast to its confluence with the Missouri River on the North Dakota side of the border, about 25 miles west of Williston.
  • Country: United States of America
  • State: Wyoming, Montana, North Dakota
  • Source: Confluence of North and South Forks
  • Mouth: Missouri River
  • Length: 692 mi (1,114 km)
  • Basin size: 70,000 sq mi (180,000 km²)

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Data from: en.wikipedia.org