Arroyo Colorado is a river in Hidalgo, Cameron and Willacy Counties, Texas, that flows mostly eastward some from Lake Llano Grande into the Laguna Madre.
Arroyo Colorado is a name derived from Spanish meaning "red creek bed".
See also Arroyo City, Texas Arroyo Colorado Estates, Texas List of rivers of Texas
References
USGS Geographic Names Information Service USGS Hydrologic Unit Map - State of Texas (1974)