Frio means cold, and it earns the name — the river is fed by springs emerging from the Edwards limestone at a steady temperature, so it runs notably colder than the summer air above it. It has cut a canyon into the southern rim of the Edwards Plateau here with bluffs several hundred feet high. Bat Cave nearby holds a maternity colony of Mexican free-tailed bats numbering in the millions, and the evening emergence is visible on weather radar.
Getting there
29.5833, -99.7389
Locations are approximate and may be inaccurate, on private land, or otherwise inaccessible. Check before you travel.
Hear it from the road
Whistlestop tells you this story automatically when you drive past. No searching, no tapping, nothing to ask.
