The Missouri River officially starts at the confluence of the Jefferson and Madison in Missouri Headwaters State Park near Three Forks, Montana, and is joined by the Gallatin a mile (1.6 km) downstream. It then passes through Canyon Ferry Lake, a reservoir west of …

Feb 1, 2025 · Missouri River, longest tributary of the Mississippi River and second longest river in North America. It is formed by the confluence of the Jefferson, Madison, and Gallatin rivers in the Rocky Mountains area of southwestern Montana (Gallatin county), U.S., about 4,000 feet (1,200 metres) above sea level. The Missouri proper has a total course ...

The Missouri River will travel more than 2,300 miles before it joins the Mississippi in its namesake state at St. Louis, forming the world’s fourth longest river system as it rolls south to the Gulf of Mexico.

Jul 8, 2023 · The Missouri River is located in the Midwestern United States and flows from Montana to Missouri. The river is named after the Native American tribe that lived along its banks. The Missouri River was one of the main routes for westward expansion in the United States.

It begins in southern Montana in the Rocky Mountains, first flowing north then generally southeast across the heart of the United States, ending at the Mississippi River, just to the north of St. Louis, Missouri. It is the longest river in the United States (2,500 miles) (4,023 km).

Apr 15, 2021 · The Missouri River is the longest river in North America. Its source is the Rocky Mountains from where it flows east and south for 2,341 miles before draining in the Mississippi at St. Louis, Missouri.

Feb 27, 2023 · Although it’s the longest river in the United States, the Missouri River is actually a tributary of the Mississippi River, the second-longest river in the country. Its headwaters begin in the Rocky Mountains area of Montana and the course runs for 2,3411 miles (3,767 kilometers) to its ending point.

The Missouri River is a river in the western United States. It is a tributary of the Mississippi River. It is longer than the Mississippi River. It is, in fact, the longest river in North America.

The Missouri River is the longest river in the United States contained in a unique geologic setting. The river marks the boundary between glaciated ice age terrain and sediments deposited by an ancient sea.

Mar 1, 2014 · What’s the Missouri River like today? Channelization and dam building have greatly changed the Missouri River. Today, 67% of the Missouri is either channelized for navigation (650 miles) or impounded by dams (903 miles). Most of the remaining free-flowing portions of the river are near the headwaters in Montana.