Lake Mohave and Lake Havasu consume the once free-flowing Colorado river. Massive diversions send water to thirsty places like Los Angeles, San Diego, Phoenix and Tucson. Urban Dwellers still find excitement along the banks, but the Remains of a River crew, Will and Zak, miss the wild places upstream. As the river becomes smaller and smaller, they leave their trusty kayaks behind and take to the pack rafts again. They press on toward the sea.