What is the main river in Colorado?
Rank River Length (miles) 1 Rio Grande 1,896 2 Arkansas River 1,469 3 Colorado River 1,450 4 Canadian River 906 What is the problem with the Colorado River? Climate change, drought and overuse of the Colorado River system are jeopardizing the reliability of this water, which supplies 40 million people in the West. Lake Mead…