Progression San Juan—Colorado Country United States of America | Mouth San Juan River | |
 | ||
Main source Confluence of West Mancos River and East Mancos River River mouth Confluence with San Juan
4,639 ft (1,414 m) | ||
The Mancos River, formerly also El Rio de San Lazaro, is an 85.4-mile-long (137.4 km) northeast 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.
Map of Mancos River, United States
The river was named for an indicent when a horse rider hurt his hand while crossing, the word Mancos being derived from Spanish meaning "one-armed".
References
Mancos River Wikipedia(Text) CC BY-SA