The Green River, the most significant tributary of the Colorado River, runs 730 miles from the glaciers of Wyoming to the desert canyons of Utah. Providing water for thirty-three million people, it flows through ranches, cities, national parks, and some of the most significant natural gas fields in the country. Stopped up by dams, slaked off by irrigation, and dried up by cities, the Green is crucial, overused, and at risk, now more than ever. Fights over the river's water, and what's going to happen to it in the future, are long-standing, intractable, and only getting worse as the West gets hotter and drier and more people depend on the river with each passing year. Former raft guide and environmental reporter Heather Hansman knew the issues but felt driven to see the situation firsthand and from a different perspective - from the river itself. So she set out on a journey, in a one-person inflatable pack raft and with an open mind, and see what the experience might teach her. Mixing lyrical accounts of quiet paddling through breathtaking beauty with nights spent camping solo and lively discussions with farmers, city officials, and other people met along the way, Downriver is the story of that journey, a foray into the present-and future- of water in the West. --