Old Tunnel Wildlife Management Area-Bat Tunnel
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Old Tunnel State Park Bat Cave


An abandoned railroad tunnel that is home to millions of Mexican free-tailed bats every May through October.  Located 10.5 miles south of Highway 290 on the Old San Antonio Road. Due to COVID-19 mandates, the park will have limited capacity for each viewing. The lower viewing area is open on Thursday through Sunday evenings for special educational presentations for a $5 per person fee. The upper viewing deck $2 per person. No permit is required if visited between sunrise and 5 p.m. Permits are sold in advance only, through an online reservation system. Permits can be purchased up to 60 days in advance and can be purchased at  



  • Additional Info: Trail is open year-round from sunrise to 5pm. Bat viewing nightly May through October. For the most up-to-date emergence information, call 866-978-2287