Yellowstone River, a river in the northwestern United States. It is 671 miles (1,080 km) long. The river's source is in the Absaroka Range of the Rocky Mountains in northwestern Wyoming. The river flows north through Yellowstone Lake and Yellowstone National Park and then veers northeastward through Montana into North Dakota. Near the Montana-North Dakota border it joins the Missouri. The Yellowstone's tributaries include the Bighorn and Powder rivers. The river is navigable only by vessels of extremely shallow draft.
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Think New York City is the state capital of New York? Then you may have a bit of trouble with this state capitals quiz. Give it a shot and learn a little something along the way. (The state capital of New York is Albany, by the way.)
Missouri River, one of the largest rivers in North America and a chief tributary of the Mississippi.