Anonymous
Anonymous asked in Science & MathematicsGeography · 1 decade ago

The longest unimpeded river in the United States?

Looking for the longest unimpeded river in the United States lock and dams count.

9 Answers

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  • Anonymous
    1 decade ago
    Favorite Answer

    Lengths of the major rivers

    Take a look at a map of the United States or of any country in the world. Notice how towns and cities tend to be located next to rivers? This is no coincidence. Rivers provide water for the essential needs of both tiny towns and huge cities. There's a good chance that you live near one of our nation's large rivers. Ever wonder what rivers are the longest? Look at the graphic below to see our short list of long rivers.

    (It's not so easy to define how long a river is. If a number of tributaries merge to form a larger river, how would you define where the river actually begins? Here, we define river length as the distance to the outflow point from the original headwaters where the name defines the complete length. (Source: Statistical Abstract of the U.S., 1986))

    WORLD

    Nile: 4,132 miles

    Amazon: 4,000 miles

    Yangtze: 3,915 miles

    UNITED STATES

    Missouri: 2,540 miles

    Mississippi: 2,340 miles

    Yukon: 1,980 miles

    Rio Grande: 1,900 miles

    St. Lawrence: 1,900 miles

    Arkansas: 1,460 miles

    Colorado: 1,450 miles

    Atchafalaya: 1,420 miles

    Ohio: 1,310 miles

    Red: 1,290 miles

    Brazos: 1,280 miles

    Columbia: 1,240 miles

    Snake: 1,040 miles

    Platte: 990 miles

    Pecos: 926 miles

    Canadian: 906 miles

    Tennessee: 886 miles

    Colorado (of Texas): 862 miles

    North Canadian: 800 miles

    Mobile: 774 miles

    Kansas: 743 miles

    Kuskokwim: 724 miles

    Yellowstone: 692 miles

    Tanana: 659 miles

    Milk: 625 miles

    Quachita: 605 miles

    Hamilton: 600 miles

    Cimarron: 600 miles

    The Yellowstone River is the longest free flowing river in the lower 48 states. Unshackled by dams, the 680-mile river begins its journey in the mountains of northwest Wyoming and extends to meet with the Missouri River in northeastern Montana. Fish, float or simply appreciate this national treasure.

    The Yellowstone River, the longest free-flowing river in The United States, is a world-class blue ribbon trout stream, teaming with trophy-size Cutthroats, Browns and Rainbows. It flows North through Paradise Valley from its source, Yellowstone Lake, in famed Yellowstone National Park

  • eaves
    Lv 4
    3 years ago

    Longest River Ever

  • 6 years ago

    The Yellowstone river is the longest free flowing in the lower 48

    692 miles, though the kuskokwim river in Alaska is the longest free

    flowing in all the 50 states of the U.S. 702 miles

  • 3 years ago

    (It's not so easy to define how long a river is. If a number of tributaries merge to form a larger river, how would you define where the river actually begins? Here, we define river length as the distance to the outflow point from the original headwaters where the name defines the complete length. (Source: Statistical Abstract of the U.S., 1986))

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  • 1 decade ago

    I think River Mississipi

    Source(s): My understanding.
  • 1 decade ago

    the liffy. yeah?

  • 1 decade ago

    i think amazon

  • Anonymous
    3 years ago

    Loads of insightful answers, thanks

  • Anonymous
    3 years ago

    thanks everyone for answering.

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