Miscellaneous
- Frio County, Texas is named for the river.
- Some cypress trees, Bald Cypress Taxodium distichum, along the Frio River and including individuals within Garner State Park TX, exceed 22 ft (6.7m) circumference and about 86ft (about 26m) height, and may be over 300 years old. A flood-damaged Bald Cypress, on the Frio bank opposite Garner State Park and a short distance above the small dam that forms the park's swimming area, was removed in the early 1990s. Its stump, about one foot (0.3m) above ground level and about 10ft (3.1m) circumference, exhibits at least 160 yearly growth rings.
- In the community of Rio Frio about 10 mi (16 km) ENE of Garner State Park is the largest Live oak (Quercus virginiana) tree yet identified in Texas.
Read more about this topic: Garner State Park