Miscellaneous
- Frio County, Texas is named for the river.
- Frio River is popularly considered navigable from well above Leakey TX to about 5 miles downstream of Concan TX. From that latter place the Frio River's water volume in summer months is insufficient to surmount the natural percolation down into limestone subsurface water courses; therefore the river bed appears dry intermittently, and the river is no longer efficiently navigable continuously year-round from that place to its confluence with the Nueces River. Applicable laws concerning navigability include statutes written in Spanish that are still in force in Texas. The river may only be accessed from public access points, and all river banks are private property. Accessing the riverbanks is only legal in the event of portaging canoes or scouting for obstructions. As stated by Texas Parks and Wildlife, who manages navigable rivers in Texas: "Senate Bill (S.B.) 155 strikes a balance between the navigation right and private property interests by providing that portaging or scouting obstructions do not create a prescriptive easement over any private property so used. Thus, under S.B. 155, if private riverside property is used to portage or scout obstructions, the landowner does not bear any risk of permanent loss of a property interest. Should it become unnecessary to use that particular riverside property to portage or scout obstructions (for example, because the river changes course), the public right of use disappears."
- The Frio River is mentioned in George Strait's song "All My Ex's Live in Texas". George Strait grew up in Frio County.
- The Frio River also played a big part in the movie Race With The Devil. This is where the scene of the sacrifice took place.
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