Parque estatal Old Tunnel is quietly situated in the Roland Hills near Fredericksburg, TX. It is a real attraction for nature lovers.
It’s not only because of its beautiful scenery and interesting walking tours, but what makes this park special is the historical abandoned railroad tunnel now full of Mexican free-tailed bats.
Anyone interested in nature, taking wildlife photos, or experiencing peace should see Old Tunnel State Park.
Visiting to see the bats or to enjoy the trails and have a picnic under the oaks, this park is special all year round.
Need somewhere nearby to stay for your trip? StayOnera, which is nearby, provides luxurious rooms that are environmentally friendly and ensure a more memorable visit.
Exploring Old Tunnel State Park and Fredericksburg, TX, is made simple from StayOnera’s nicely built treehouses, glass cabins, and outdoor soaking tubs.
What is Old Tunnel State Park?
About 13 miles southeast of Fredericksburg, you will find Parque estatal Old Tunnel, which covers 16 acres and is both scenic and full of historical interest.
- At its opening in 1913, the abandoned railroad tunnel was used by the Fredericksburg and Northern Railway.
- As the railway had less use over time, the surrounding scenery grew wild, and gradually a home for wildlife was created, led by Mexican free-tailed bats.
- An important milestone for the site was its recognition as a state park in 2012, and now it safeguards one of the smallest parks in Texas.
Apart from its background, the park is famous because:
Scenic Beauty: Old Tunnel State Park is the smallest in the state, with only 16.1 acres. But it makes up for being small by being very charming and peaceful.
Nature Trail: Go for a gentle walk on the nature trail, which is less than half a mile long. Notice the animals and birds near you, but also let the interesting signs teach you about bats, the WWII-era tunnel, and trains.
Wildlife Research: The Texas Parks and Wildlife Department bought Old Tunnel State Park in the 1990s, and biologists have studied the park’s wildlife since then. Results from these research projects support biologists in deciding how to manage wildlife, and research goes on to this day.
Birdwatching: It attracts many migratory birds that pass through the Central Flyway.
Mexican Free-Tailed Bats: A Must-See Attraction
Many come from far and near to see the twilight migration of Mexican free-tailed bats, which attracts huge crowds from May to October.
At this time, a breathtaking circle of over 3 million bats flying out in unison makes you feel as though you are hearing a living musical score rather than watching animals.
There are two main viewing areas: the lower deck, which is fee-based and offers educational events, and the upper deck.
Make Your Evening Better with a Bat Tour
Visitors can participate in ranger-guided bat tours that guarantee good viewing and help explain bats, their behavior, and how they are protected.
Many people want to join these bat tours, so booking in advance is advised. You can directly call them and book your reservation.
Best Time to Spot Bats
Month: May to October
Time: Get there around 30–45 minutes in advance to secure a decent spot before sunset.
Things to Do in Old Tunnel State Park
Besides the major highlight of bat watching, a myriad of activities await you to complete your trip.
Bat Viewing
The nightly bat emergence, which takes place at Old Tunnel State Park, is the main event.
More than 3 million Mexican free-tailed bats emerge from the former railroad tunnel every night in pursuit of food. Bats start to leave their roosting place around dusk, and this continues for 30 minutes. To see them up close:
- Try to reach early to get a prime location.
- Pick the viewing area close to the exhibit for a better view and to join the ranger programs
- To maintain night vision and not upset the bats, bring a red-light flashlight.
Hiking
A delightful short stroll around the Old Tunnel Trail, giving a view into the tunnel and green vegetation. The trail is well-marked and suited for beginners or families.
- Out-and-back and loop with a small downhill slope toward the tunnel.
- It is open daily from sunrise to 5 p.m.
- Hiking to the tunnel is not allowed after hours to protect the bats.
Pro Tip: Water and closed-toe shoes are recommended. The trail is short yet somewhat rocky and uneven.
| Difficulty | Easy |
| Distance | 1.1 km |
| Elevation Gain | 41 m |
| Duration | 21 minutes |
| Dogs Allowed | No |
Wildlife & Bird Watching
Besides bats, Old Tunnel also has quite a few animals for viewing:
- Birds: Painted buntings, cardinals, and wrens.
- Critters: You might sometimes spot an armadillo, a raccoon, or a deer during dusk.
- Insects: Various kinds of beautiful butterflies and moths flutter around wildflowers and brush.
An awesome stop for nature photographers or just anyone who enjoys a tranquil, peaceful time in the outdoors.
Go for a picnic
Though picnic tables aren’t provided, the parking and upper viewing areas have a few benches and places out of the sun.
- It is a relaxed spot to have a Hill Country picnic before sunset, prior to the bats flying out.
- Fredericksburg or Luckenbach are fantastic places to buy tasty local snacks or sandwiches in advance.
Visiting Old Tunnel State Park: Hours, Tickets, and Travel Tips
Parque estatal Old Tunnel draws crowds of visitors all the time, and especially when it’s bat season.
No matter if you want to hike during the day or see the amazing emergence of bats at dusk, here is all the information you need to have a great visit.
Old Tunnel State Park hours
The park functions on a schedule that changes with the needs of visitors and the habits of the bats:
Morning Hours
Hiking, bird watching, and nature photography are possible here, open daily from sunrise until 5:00 PM. The entrance to the hiking trails and tunnel is closed after 5 PM to protect bats and their natural environment.
Evening Hours
The park is open in the evening during bat season for people interested in the bat emergence. Entrance through the gates is generally allowed at 6:00 PM, though opening times may change because of sunset and seasonal shifts.
Old Tunnel State Park tickets
Visiting the park in the daytime is free for everyone. You have to pay a fee if you plan to see the bats coming out from their colonies at night.
Children under the age of three are not permitted in the lower viewing area due to the bat’s sensitivity to noise disruption.
Here are the fees at the moment. You can book your tickets online or offline.
Bat Viewing Tickets
| Viewing Deck | Precio |
| Lower Viewing Area | $5 |
| Upper Viewing Area | $2 |
Tickets can be bought at the site, but the number is limited. People in large groups and photographers are advised to come early or call the place beforehand on busy weekends or holidays.
What to Pack
To get the most enjoyment during your visit for hiking and viewing bats, don’t forget these few necessities:
- Wear some good walking shoes. The road on the trail is rocky and slopes slightly uphill.
- Use binoculars to follow birds or look at bats flying in the upper part of the building.
- A zoom lens allows for great shots of wildlife and things at night.
- A flashlight or headlamp is something you should have when you leave the event after dark.
- The evening air brings out lots of mosquitoes in summertime, so carry bug spray.
- Bring your food and drinks because there are no stands to buy from.
- Get a blanket or a camp chair so you can enjoy watching bats from either spot.
- Consider bringing a jacket or sweater since things get cooler outside in the evenings in spring and fall.
Best Time to Visit Old Tunnel State Park Fredericksburg TX
Although the park is open all year, the best time to watch bats is from May to October.
Summers in the Texas Hill Country are generally hot and dry, and the weather can be quite different from one season to another. Keep in mind these seasonal aspects:
Spring (March to May)
It is very good for seeing wildflowers and birds. It is not too hot, especially early in the day.
Summer (June to August)
Visits in the afternoon will give you great bat watching experiences, but the heat may peak at 90–100°F. Go during the early morning or late evening to avoid heatstroke.
Fall (September to October)
Still a good time for seeing bats; the highest activity for bats is before they leave for migration, which happens in late October. The evenings are cooler, which makes hiking and taking pictures at sunset enjoyable.
Winter (November to February)
The bats migrate to Mexico for winter, so bat viewing is not offered. Trails are open only during the day, and the park is quiet then.
Being away from the crowds on weekdays is a good time for those who want to look for wildlife and take pictures. During bat season, it can get very crowded over the weekends, so make a plan well in advance.
Parking
You can find a single parking lot right near the start of the Old Tunnel State Park. These are the details:
- Parking without charge at any time of day or night.
- There’s not a lot of space, and it often gets crowded an hour before sundown during bat season, mostly on weekends.
- RVs cannot park or camp in the neighborhood.
- Washroom facilities are found close to the parking area.
Accessibility
The Upper Viewing Area is connected by a paved walkway and is simple for people with mobility issues to reach.
The Lower Viewing Area can be accessed by a steeper, uneven path that is difficult for wheelchair users and strollers.
Where to Stay: StayOnera – The Perfect Base for Exploring Fredericksburg and Old Tunnel State Park
If you are finished with your hike or bat tour, you can relax in StayOnera, a secluded place offering luxury near the park. Their treehouses, cabins, and luxury pods blend a focus on sustainability with a chance to enjoy nature.
Highlights of StayOnera:
- Soaking tubs you can enjoy outside for observing stars and relaxing
- Both private decks and patios that give a view of the Hill Country
- Kitchenettes, soft furnishings, and items made with eco-friendly materials
- Available are on-site trails and meditation places
Planning a couple’s trip, going on your own, or wanting to enjoy the outdoors? StayOnera Fredericksburg has the right blend of comfort and convenience, close to Old Tunnel State Park.
Old Tunnel State Park Map
Even though the park is not big, a trail map can guide you and give you a better experience. Here you can find the official map of Old Tunnel State Park.
Map Highlights:
- Old Tunnel Trail begins here, and it is also the place to find viewing decks.
- You’ll find picnic areas just close to the parking lot.
- Signposts have been put up on the deck to indicate upper and lower locations.
- Use the signs that show where to view the bats if you arrive after sunset.
Final Thoughts | Old Tunnel State Park
Even though Old Tunnel State Park is not big, it offers a truly impressive sight of wildlife. In what other place can you walk on a peaceful path in the day and see 3 million bats twist in the sky at night?
This place mixes its history, scenic outdoors, and true Texas feel beautifully. When the sun goes down behind the Hill Country hills and birds start to fly, you will see that Old Tunnel is not only a tunnel, but also much more.
It’s easy to cover in just a few hours, but it offers plenty to do, like hiking, watching animals, and taking memorable photos.
Once the day is done, nothing compares to relaxing at StayOnera, which blends environmentally friendly luxury with Austin’s Hill Country ambience.
FAQs | Old Tunnel State Park
1. What is Old Tunnel State Park known for?
Old Tunnel State Park is famous for its abandoned railroad tunnel that is now home to over 3 million Mexican free-tailed bats. From May to October, visitors can watch an incredible bat emergence at dusk. It’s also popular for its scenic hiking trail, birdwatching, and peaceful Hill Country setting.
2. When is the best time to see the bats at Old Tunnel State Park?
The best time to see the bats is from May to October, just before sunset. Arrive 30–45 minutes early to get a good spot for viewing, especially on weekends or holidays when it gets crowded.
3. Is there an entry fee to visit Old Tunnel State Park?
Daytime visits are free, but bat viewing in the evening comes with a small fee:
- Lower Viewing Area: $5 per person
- Upper Viewing Area: $2 per person
Children under 3 are not allowed in the lower viewing area.
4. What should I bring for a visit to Old Tunnel State Park?
Essentials include:
- Comfortable walking shoes
- Bug spray
- Binoculars and a zoom lens
- Red-light flashlight
- Water and snacks
- Blanket or portable chair
- Jacket or sweater (for cooler evenings)
5. How long is the hiking trail at Old Tunnel State Park?
The trail is a short and scenic 1.1 km (0.7 miles) out-and-back route with 41 meters of elevation gain. It takes around 20 minutes to complete and is suitable for beginners. Hiking is only allowed from sunrise to 5 PM.
6. Can I bring pets to Old Tunnel State Park?
No, dogs and other pets are not allowed at Old Tunnel State Park due to wildlife protection, especially during bat season.
7. Are bat tours available at Old Tunnel State Park?
Yes, ranger-led bat tours are available and highly recommended. These tours provide insights into bat behavior and conservation efforts. Reservations are encouraged as they tend to fill quickly.
8. Is the park accessible for people with disabilities?
En Upper Viewing Area is wheelchair accessible via a paved path. However, the Lower Viewing Area has a steeper, uneven trail and may not be suitable for those with limited mobility or strollers.
9. Are there any picnic areas inside Old Tunnel State Park?
The park does not have official picnic tables, but benches near the upper viewing deck y parking lot can be used for casual picnics. Visitors often bring food from Fredericksburg or Luckenbach.
10. Where can I stay near Old Tunnel State Park?
StayOnera in Fredericksburg is a top choice. It offers luxury eco-friendly accommodations like treehouses, glass cabins, and pods with outdoor soaking tubs, stargazing decks, and on-site nature trails—perfect for relaxing after a day at the park.