Starting as a trickle in the Rocky Mountains, the Eagle River emerges in a glacial valley, cuts through a spectacular gorge near Red Cliff, and then creates the broad flood plain of the Eagle River Valley. At Dotsero, the river joins the mighty Colorado River. As long as humans have settled along the river, they have depended on it for their livelihood, trapping beaver for hats, mining gold and silver, collecting water for locomotive engines and channeling...