Animas River
 Animas River is a 126-mile-long (203 km) river in the western United States a tributary of the San Juan River part of the Colorado River System. The river's free-flowing status will soon end as the Animas-La Plata Water Project nears completion. The project will pump water over a low pass to fill a reservoir Lake Nighthorse in Ridges Basin to satisfy Southern Ute tribal water rights claims associated with the Colorado Ute Settlement Act amendments of 2000.