East Mancos River
Encyclopedia
East Mancos River is a 12.2 miles (19.6 km) tributary of the Mancos River
Mancos River
Mancos River is an tributary of the San Juan River. It flows from the confluence of West Mancos River and East Mancos River near Mancos, Colorado and joins the San Juan near Four Corners Monument in New Mexico.-See also:*List of rivers of Colorado...

 in Montezuma County, Colorado
Montezuma County, Colorado
Montezuma County is the southwesternmost of the 64 counties of the state of Colorado of the United States. The county population was 23,830 at U.S. Census 2000...

. The river flows west from a source in the La Plata Mountains
La Plata Mountains
The La Plata Mountains are a small subrange of the San Juan Mountains in the southwestern part of Colorado, United States. They are located on the border between Montezuma and La Plata counties, about northwest of Durango. Their name is Spanish for silver.The peaks of the range are easily visible...

 to a confluence with the West Mancos River
West Mancos River
West Mancos River is a tributary of the Mancos River in Montezuma County, Colorado. The river flows from the confluence of its North and South forks in the San Juan National Forest to a confluence with the East Mancos River that forms the Mancos River....

that forms the Mancos River.
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