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The Green River, which rises in Wyoming's Wind River Range, is the largest tributary of the Colorado River. The Green River's sources are the Green River Lakes in Sublette County, Wyoming. From there, the river flows for over 730 miles through Wyoming, Utah, and, briefly, Colorado. The Green River's watershed in Colorado, Utah, and Wyoming includes those of its major tributaries, the Yampa and White rivers. The Green River flows through many public lands, from its source in the Bridger-Teton National Forest through Ashley National Forest, Flaming Gorge National Recreation Area, Dinosaur National Monument, and Canyonlands National Park. Many state and federal wildlife management areas, including Brown Park National Wildlife Refuge, also lie on or near the Green River's banks. Like the Colorado River, ...

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