Google Maps sails down the Colorado River (pictures)

Google loaded its Street View trekker onto a raft and set sail down the country's most endangered river: the Colorado River. This journey takes in views of the Grand Canyon and all sorts of other natural and geological sights, like the 36-mile rapids seen here.

The Colorado River has been around for more than 6 million years, carving 1,450 miles down the Rocky Mountains, through the deserts of Utah, Arizona, and Nevada, and emptying into the Gulf of California in Mexico. The Grand Canyon is so massive that it can be seen from outer space. Yet, because of its being excessively dammed, diverted, and plumbed, the river has been deemed "America's most endangered river."

Google partnered with American Rivers conservation group to map out the course of the Colorado River and highlight attractions along the way. Seen here is Grand Canyon National Park in Arizona.

Pictured here is North Canyon, which is a side canyon of the Grand Canyon and is made of Supai sandstone.

Google's Street View trekker managed to get images of local fauna, like this big horn sheep.

Vulcan's Anvil is one of the geological attractions along the Colorado River.

Because of being overly dammed and diverted, by the time the Colorado River reaches the Gulf of California in Mexico it's barely a trickle. Seen here is evidence of the river’s decline with sedimentation along the river’s edge down by Lake Mead.

One of the sights along the route is the Redwall Cavern, which was created by the Colorado River carving into the redwall limestone for thousands of years.