How long will it take to go the length of the river?
Description from Daily Overview
In this Overview, the San Juan River is shown meandering through southeastern Utah, not far from Goosenecks State Park. It is a major tributary of the Colorado River and provides drainage to the Four Corners region of Colorado, New Mexico, Utah and Arizona. The San Juan is one of the muddiest rivers in North America, carrying an average of 25 million U.S. tons of silt and sediment each year.
Video Answer
Daily Overview / Satellite imagery courtesy of Digital Globe / Benjamin Grant
When Math Happens 