Fredericksburg - Old Tunnel State Park

Old Tunnel State Park features an abandoned railroad tunnel that was built in 1913. The tunnel is now home to a colony of approximately 3 million Mexican free-tailed bats. These bats migrate up from Mexico and are present in the tunnel from May through October each year.

Visitors may access the short 1/2 mile nature trail every day from sunrise until 5 p.m. No permit or entrance fee required to visit the park between sunrise and 5 pm. (If you find the trail closed sign up and/or gate closed/latched during these hours, please feel free to open the gate and go down the trail.)

Rules: No pets, No Camping, No alcoholic beverages, No smoking on trails or in viewing areas. No refunds or rain checks if you do not see bats or if the park closes due to weather related issues.