What Is the Longest River in US?

Answer

The longest river in the US is the Missouri River. This river is about 6,275 kilometers long or 3902 miles. This river is a tributary of the Mississippi river; the second longest river in the US followed by the Yukon River. There are over 250,000 rivers in the United States.
1 Additional Answer
The longest river in United States of America is the Missouri River. The Missouri River is a major river of central North America and is a tributary of the Mississippi River. It also measures at over 2, 340 miles or 3, 770 kilometres.
Q&A Related to "What Is the Longest River in US"
I would have thought the longest river in United States was the Mississippi River. The Missouri River is the longest stretching 2,540 miles.
http://answers.ask.com/Travel/Other/what_is_the_lo...
MISSIPPI RIVER,don't you know GEOGRAPHY.
http://wiki.answers.com/Q/What_river_is_the_longes...
The Mississippi River, from Lake Itasca in Minnesota to the Gulf of Mexico, is
http://www.chacha.com/question/what-is-the-longest...
The Rio Grande is 1,896 miles in length and runs south through New Mexico where it flows from the San Juan Mountains of Colorado. It continues southeast along the borders of Mexico
http://www.ehow.com/facts_7254432_longest-river-te...
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