The Yellowstone River, the longest undammed river in America, begins its journey south of Yellowstone National Park and ends by marrying the Missouri River near the intersection of North Dakota and Montana. Here, the river runs through Hayden Valley in Yellowstone National Park. Many believe it is an ideal candidate to be declared a Wild or Scenic river.  Photo courtesy National Park Service.
The Yellowstone River, the longest undammed river in America, begins its journey south of Yellowstone National Park and ends by marrying the Missouri River near the intersection of North Dakota and Montana. Here, the river runs through Hayden Valley in Yellowstone National Park. Many believe it is an ideal candidate to be declared a Wild or Scenic river. Photo courtesy National Park Service.