Pull up to the Calaveras Lake boat ramp on a January morning and you’ll see steam rising off the water. That’s not fog — it’s warmth. The lake sits adjacent to CPS Energy’s Calaveras Power Station, and the plant’s discharge keeps water temperatures elevated year-round. In the middle of Texas winter, the bass are still active, the catfish are feeding, and fishermen who’ve been coming here for decades are already rigging up in the dark.
Calaveras is a reservoir in the far southeast corner of Bexar County, about eighteen miles from downtown. The drive out Highway 181 past the stockyards and the feed stores tells you something about the crowd you’ll find there — this is working-class fishing country, not a destination park with kayak rentals and a coffee cart. The lake covers roughly 3,500 acres, with shallow flats on the north end and deeper channels to the south. Largemouth bass, white bass, and catfish are the main draws, though the warm water has historically attracted stripers too.
Texas Parks & Wildlife manages access. A daily fishing permit runs around five dollars for adults, on top of your standard Texas fishing license. There’s a boat ramp, a modest marina that rents aluminum fishing boats by the hour, and a bait stand that opens early enough to be useful. Camping is available in basic sites — don’t expect hookups or amenities, but the sites near the water fill up on spring weekends, so call ahead if that’s your plan.
The thermal discharge isn’t just a fishing quirk. The warmer water creates a distinctive microhabitat, and birders who’ve figured this out show up with spotting scopes in January to scan for species that don’t normally winter this far north. White pelicans are a reliable winter sight here, drifting in loose rafts near the warmer outflow areas. Neotropical migrants move through in spring, and the shoreline vegetation along the less-trafficked stretches holds some surprises for patient observers.
On summer evenings, the lake draws families with kids who just want to bank fish for catfish or throw a cast net for shad. It’s the kind of place where nobody gives you a hard look for bringing a lawn chair and a cooler. The pace is slow. The conversation tends toward fishing reports and complaints about the heat, in roughly equal measure.
What makes Calaveras genuinely distinctive is how thoroughly off the radar it stays. San Antonio has a few recreational lakes — Medina, Braunig — but Calaveras feels the most local, the least curated. There’s no paddleboard yoga. The marina’s not going to win any design awards. But if you show up at first light on a weekday morning in February, with a box of cut shad and some patience, you’ll have a couple hundred acres of warm water basically to yourself, and the fishing will be better than you have any right to expect from a lake that close to a power plant.
That’s the Calaveras deal. The scenery isn’t dramatic. The facilities are functional, nothing more. But the fish don’t care about any of that, and after a few hours out there on a cool morning with the steam lifting off the water, neither will you.
