The Mackenzie River is the second longest river in North America. The first longest is the well known Mississippi River. ...
http://www.blogcatalog.com/blogs/where-what-how-why/pos...
possibly the Mackenzie but that was just a judgement off a map.
http://wiki.answers.com/Q/What_is_the_longest_north_flo...
No, the longest river in north America is the Mississippi/Missouri.
http://wiki.answers.com/Q/Is_the_Yukon_the_longest_rive...
The Mississippi is the longest river in north America at 3,902 Miles in length, it is the 4th longest river in the world as well as the longest river in the US . The Mackenzie is the second longest river in north America at 2,637 miles in l...
http://wiki.answers.com/Q/What_is_the_longest_river_in_...
There are 250,000 rivers in North America.
http://wiki.answers.com/Q/How+many+english+territory+in...
Mississippi River used to be the longest river in North America, but Missouri River is now the longest in North America.
http://wiki.answers.com/Q/Which_is_the_longest_river_on...
If you said the Mississippi River, you’re one of almost 80 percent of Americans who guessed wrong in a recent survey conducted for the National Geographic Society. In fact, the Missouri River is the nation’s longest river—but Meriwether Lew...
http://www.atouchofgrey.com/LewisClark.html