The Frio River is a river in the U.S. state of Texas. The word frio is Spanish for cold, a clear reference to the spring-fed coolness of the river.
The Frio River has three primary feeds; the East, West, and Dry Frio rivers. The West Frio River rises from springs in northeastern Real County and joins with the East Frio River near the town of Leakey; the Dry Frio River joins northeast of Uvalde. The river flows generally southeast for two hundred miles until it empties into the Nueces River south of the town of Three Rivers. Along the way, the Frio River provides water to the Choke Canyon Reservoir in McMullen and Live Oak counties.