Online Highways Home > Arizona > Colorado River The Colorado River runs through Grand Canyon National Park and forms a natural water border between Arizona and California. The Colorado River is the primary river of the American Southwest, draining somewhere in the vicinity of 242,000 square miles of land, from the states of Wyoming, Colorado, Utah, New Mexico, Arizona, Nevada and California. The Green River is the primary tributary of the Colorado River, and until 1921 the Colorado River did not technically begin until the Grand and Green Rivers joined together in Utah. In that year the Grand River was renamed as the Colorado River, at the request of the State of Colorado. The headwaters of the Colorado River are located in Rocky Mountain National Park in Colorado. By the time the river enters the Grand Canyon, at Lee's Ferry, its altitude has fallen to 3,110 feet, dropping over one mile since its beginning. Other upcoming events include:

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agentozzy "I should hire some of those people from Arizona. Since they are from Mexico all I need to do is feed them a nut type paste with jalapino."
Arizona_travels "LULAC applauds court ruling on Arizona law, braces for fight in Texas http://dlvr.it/3BnlP"
1SupremeGoddess "RT @BreakingNewz: Fox News Politics- Arizona Sheriff Not Relenting After Court Ruling: Lost in the hoopla ... http://bit.ly/csPsj9"
Latest Tweets About Colorado Arizona

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weather_denver "Denver weather Jul 30 20:53 Temperature 20u00b0C clouds Wind SW 20 km/h Humidity 75% .. http://bit.ly/bgvBP9"
Latest Tweets About River Arizona

amber_parker23 "fishin on the river. damn fish r gettin fed!!! http://twitpic.com/2a5rjn"
cornel316 "My kids found a dead gator on the Mississippi River bank."
KMLeibrandt "RT @omgfacts: The day after US Air Flight 1549 landed safely in the Hudson River, some states shut down their LOTTERIES. Why? --> http://bit.ly/9ixWvC."
Nautiikidd "@complexxDev old river rd...u at supportive now?"
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