Trail is open year-round from sunrise to 5 p.m.
Bat viewing nightly May through October. Monday through Wednesday evenings the trail and lower viewing area are closed. On Thursday through Sunday evenings, the trail will only be open to visitors 4 years of age and older who pay admission to view the bats at the lower viewing area.
Only 250 people are allowed in the upper viewing area. If we reach that limit, we close the parking lot next to the upper viewing area. We will admit more visitors to the upper viewing area as people leave. Please arrive early, especially on busy weekends like Memorial Day, 4th of July, or Labor Day. We open at 5 p.m. and can reach the limit quickly.
For the most up-to-date emergence information, call the toll-free information line at (866) 978-2287.
There is no phone at Old Tunnel. If you need to contact us, e-mail Old.Tunnel@tpwd.texas.gov.