It flows for approximately 3,767 km (2,341 mi) from the Rocky Mountains in western Montana to Missouri where it meets the Mississippi River to the north of St. Louis. North America’s longest rivers typically offer the most benefits, and they usually need … The Missouri River, just slightly longer than the Mississippi River, combines with it to form the fourth largest river … The Mississippi River is the largest and most important river in North America. These four great rivers are the only rivers … If you consider all the benefits that North America’s major rivers provide, then you won’t be surprised that river preservation and conservation efforts are hot topics among environmental groups in Canada, the United States, and Mexico. This great river, often referred to as the “Mighty Mississippi,” originates as a small brook flowing out of Lake Itasca in Minnesota and, 2,340 … Rivers in the United States that flow principally from south to north are less common than rivers that flow principally from north to south, due to the shape of the North American landmass and the location of most of the contiguous United States in the southern half of North America. In terms of length by main stem, the Missouri River is the longest on the continent. Rising in the Rocky Mountains of western Montana, the Missouri flows east and south for 2,341 miles (3,767 km) before entering the Mississippi River north of St. Louis, Missouri.The river drains a sparsely populated, semi-arid watershed of more than 500,000 … The first table below ranks the 100 highest major summits of greater North America by elevation. *Less than 15,000 ft 3 /s and therefore not among the largest rivers in terms of discharge.. 1 In east-central Louisiana 50 miles northwest of Baton Rouge, the Red River flows into the Atchafalaya River, a distributary of the Mississippi River. The discharge of the Atchafalaya River, as shown in the table above, includes the entire discharge of the Red River… 9. The Mississippi-Missouri river system is the longest in North America with a distance of 6,275km. The river starts at Lake Itasca which is located in Northwestern Minnesota and ends at the Gulf of Mexico located in Southern Louisiana. Rivers flow downhill from their source, and usually the source is somewhere in the mountains located north of the river's mouth. The Missouri River is the longest river in North America. With its tributaries, the Mississippi River drains all or part of 31 U.S. states and two provinces in Canada. The Nile, which is the longest river on Earth, is arguably the most famous river that flows in a northerly direction. It has been nicknamed Big Muddy due to its length as the first among the The Mississippi River is the largest river system in North America.About 2,320 miles (3,730 km) long,the river originates at Lake Itasca, Minnesota and flows slowly southwards in sweeping meanders, terminating 95 river miles below New Orleans, Louisiana where it begins to flow to the Gulf of Mexico. The Mississippi River. Rivers that flow north are a difficult concept for some to grasp. The river flows 2,341 miles until it reaches its mouth at the Mississippi River north of St. Louis. Running between the state of Missouri and its source in Montana, the longest river in North America is the Missouri River. The title of the longest river in North America is the subject of much debate. It is also the fourth longest river in the world, behind the mighty Amazon River (6,992km), the Nile River (6,853km) and Yangtze River (6,300km). The summit of a mountain or hill may be measured in three principal ways: . Dataset of the longest rivers in North America. ; The topographic prominence of a summit is … Mississippi River, the longest river of North America, draining with its major tributaries an area of approximately 1.2 million square miles, or about one-eighth of the entire continent. The topographic elevation of a summit measures the height of the summit above a geodetic sea level. The Mississippi River is not only the second longest river in the world but it’s also one of the biggest drainage systems within North America.