| Old Tunnel State Park | |
|---|---|
 Old Tunnel | |
  Old Tunnel State Park  Old Tunnel State Park | |
| Location | Kendall County, USA |
| Nearest city | Fredericksburg Comfort, Texas |
| Coordinates | 30°06′03.6″N 98°49′15.6″W / 30.101000°N 98.821000°W |
| Area | 16.1 acres (6.5 ha) |
| Established | 2012 |
| Visitors | 31,816 (in 2022)[1] |
| Governing body | Texas Parks and Wildlife Department |
Old Tunnel State Park is a railroad tunnel of the Fredericksburg and Northern Railway, which ceased operations in 1942. The property came under the care of Texas Parks and Wildlife Department, and was officially made a state park in 2012. It is located halfway between Fredericksburg and Comfort on Old San Antonio Road. Since the shut down of the railway, the tunnel has become a bat cave, hosting over 3 million Mexican free-tailed bats and 3000 Cave myotis bats. The bats emerge at sunset during the months of May through October, and viewing is open to the public.[2]
At 16.1 acres, it is the smallest state park in Texas.[3]