Colorado River, Little Snake River, South Platte River, Arkansas River, Elk River, Fryingpan River, Green River, North Platte River, Piney River, Piedra River, Rio Grande, Roaring Fork River, San Miguel River, Smoky Hill River, Snake River, Slate River, Uncompahgre River, White River, Wind River, Yampa River, Bear River, Big Thompson River, Blue River, Canadian River, Cimarron River, Little Delores River, San Juan River, Animas River, Republican River