Old Tunnel Wildlife Management Area-Bat Tunnel
view more

Old Tunnel State Park Bat Cave


Enjoy hiking, bird-watching and general wildlife viewing on the half-mile nature trail at Old Tunnel State Park. It is an abandoned railroad tunnel that is home to millions of Mexican free-tailed bats seasonally. Located 10.5 miles south of Highway 290 on the Old San Antonio Road. From November to April, the park requires reservations to enter after 5 p.m. 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, search "Old Tunnel State Park" on Facebook.