East Mancos River is a U.S. Geological Survey. National Hydrography Dataset high-resolution flowline data. The National Map , accessed March 21, 2011 tributary of the Mancos River in Montezuma County, Colorado. The river flows west from a source in the La Plata Mountains to a confluence with the West Mancos River that forms the Mancos River.
See also List of rivers of Colorado List of tributaries of the Colorado River
References