Trident Bodies of Water

The Missouri River drains one-sixth of the United States and encompasses nearly 530,000 square miles. In Montana, the river begins near Three Forks and is formed by the convergence of three other rivers, the Gallatin, Jefferson and Madison. After travelling over 700 miles across Montana, the Missouri continues east into North Dakota, south into South Dakota, Nebraska and Iowa and ends up in Missouri when it connects with the Mississippi River.