what is the longest river in the united states
Missouri River
title: Missouri River text: Missouri River The Missouri River is the longest river in North America. Rising in the Rocky Mountains of western Montana, the Missouri flows east and south for before entering the Mississippi River north of St. Louis, Missouri. The river takes drainage from a sparsely populated, semi-arid watershed of more than half a million square miles (1,300,000 km), which includes parts of ten U.S. states and two Canadian provinces. When combined with the lower Mississippi River, it forms the world's fourth longest river system. For over 12,000 years, people have depended on the Missouri River and its tributaries as a source title: Susquehanna River text: Susquehanna River The Susquehanna River (; Lenape: Siskëwahane) is a major river located in the northeastern and mid-Atlantic United States. At long, it is the longest river on the East Coast of the United States that drains into the Atlantic Ocean. With its watershed, it is the 16th-largest river in the United States, and the longest river in the early 21st-century continental United States without commercial boat traffic. It is the longest unnavigable river in the world. The Susquehanna River forms from two main branches: the "North Branch", which rises in Cooperstown, New York, and is regarded by federal mapmakers title: Missouri River text: extend much farther upstream than the main stem. Measured to the farthest source at Brower's Spring, the Jefferson River is long. Thus measured to its highest headwaters, the Missouri River stretches for . When combined with the lower Mississippi, the Missouri and its headwaters form part of the fourth-longest river system in the world, at . By discharge, the Missouri is the ninth largest river of the United States, after the Mississippi, St. Lawrence, Ohio, Columbia, Niagara, Yukon, Detroit, and St. Clair. The latter two, however, are sometimes considered part of a strait between Lake Huron and Lake Erie. Among title: Missouri River text: and recreational use – notably the Niobrara National Scenic River, which is a protected stretch of the Niobrara River, one of the Missouri's longest tributaries. The Missouri flows through or past many National Historic Landmarks, which include Three Forks of the Missouri, Fort Benton, Montana, Big Hidatsa Village Site, Fort Atkinson, Nebraska and Arrow Rock Historic District. Missouri River The Missouri River is the longest river in North America. Rising in the Rocky Mountains of western Montana, the Missouri flows east and south for before entering the Mississippi River north of St. Louis, Missouri. The river takes drainage from a title: Brazos River text: Brazos River The Brazos River ( ), called the "Rio de los Brazos de Dios" (translated as "The River of the Arms of God") by early Spanish explorers, is the 11th-longest river in the United States at from its headwater source at the head of Blackwater Draw, Curry County, New Mexico to its mouth at the Gulf of Mexico with a drainage basin. Being one of Texas' largest rivers , it is sometimes used to mark the boundary between East Texas and West Texas. The Brazos proper begins at the confluence of the Salt Fork and Double Mountain Fork, two