Jefferson River, one of the headstreams of the Missouri River. It is located in Montana and is 217 miles (349 km) long. From its source to Dillon, the river is called Red Rock Creek. From Dillon to Twin Bridges, it is called Beaverhead River. The name Jefferson River is given to the course from Twin Bridges to Three Forks, where the Jefferson, Madison, and Gallatin rivers join to form the Missouri.
Missouri River, one of the largest rivers in North America and a chief tributary of the Mississippi.
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.)