Alamosa River
The Alamosa River is a river in the southern part of the U.S. state of Colorado. It is about long, flowing roughly east through the San [Luis Valley]. Its watershed comprises about.
The river's name means "shaded with Populus [sect. Aegiros|cottonwood]s" in Spanish.
The river was affected by the Summitville mine disaster, the worst cyanide spill in United [States history].