Old Tunnel State Park - United States
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About Old Tunnel State Park
RV quick facts for Old Tunnel State Park
| Detail | Information |
|---|---|
| Max RV length | On-site parking is limited and not designed for large RVs; oversized rigs should park in Fredericksburg and drive in |
| Full hookups | None on site; no camping is permitted at Old Tunnel State Park |
| Dump station | Not available on site; use facilities at RV parks in Fredericksburg |
| Generator hours | Not applicable; day-use and evening viewing only |
| Cell service | Generally available from major Texas carriers, though rural Hill Country coverage can be spotty |
| Road restrictions | Narrow, winding rural roads on final approach; no tunnels or weight limits but caution advised for long trailers |
| Reservation window | Tickets for the lower bat viewing area are sold through Texas Parks and Wildlife and can sell out on summer weekends |
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Best time to visit Old Tunnel State Park
The best time to visit is May through early October, when the bat colony is present and nightly emergences occur at dusk. June through August offers the most reliable, large flights as pups join the adults, though it is also the hottest time in the Hill Country. Spring and early fall shoulder months bring cooler temperatures and fewer crowds at nearby Fredericksburg RV parks. The bats migrate to Mexico for winter, so the park and its programs are closed from late fall through early spring.
Park closed for the season; bats are in Mexico.
Park closed for the season.
Park closed; bats have not yet returned.
Limited programming; bats begin arriving late in the month.
Bat season opens; evening emergences begin.
Peak bat viewing; hot afternoons, bring water.
Peak season; pups fly with adults for very large emergences.
Peak season; book tickets well ahead.
Still active; slightly smaller flights as migration begins.
Season winds down; flights end as bats depart.
Park closed; bats have migrated.
Park closed for the season.
Things to do at Old Tunnel State Park
- Upper Bat Viewing Area EasyRV parking available
The upper viewing area is a free, first-come-first-served deck where visitors can watch the nightly Mexican free-tailed bat emergence during the warm season. Arrive about an hour before sunset for a good spot. Park staff often give short talks before the flight.
- Lower Bat Viewing Program EasyRV parking available
The ticketed lower viewing area brings visitors closer to the tunnel mouth for an immersive emergence experience. Programs run on select evenings in summer and fall and should be reserved in advance through Texas Parks and Wildlife. Wear closed-toe shoes and bring insect repellent.
- Nature Trail EasyRV parking available
A short half-mile loop winds through Hill Country oak and juniper woodland near the tunnel. The path is shaded and suitable for families, with interpretive signs on local plants and wildlife. Best walked in the cooler morning hours before returning for the evening bat flight.
- Wildflower and Bird Watching EasyRV parking available
The park grounds host seasonal Texas Hill Country wildflowers in spring and a variety of songbirds year round when open. Bring binoculars and a field guide for painted buntings, vireos, and warblers. Morning light is best for photography along the trail.
- Hill Country Scenic Drive
The drive along Old San Antonio Road between Fredericksburg, Old Tunnel, and Comfort is a classic Texas Hill Country route with rolling terrain and rural scenery. Pair a daytime drive with an evening bat viewing for a full day out. RVers should plan fuel stops in Fredericksburg or Comfort.
- Day Trip to FredericksburgRV parking available
Historic Fredericksburg is about ten miles north and offers RV-friendly parking lots, German heritage restaurants, wineries, and the National Museum of the Pacific War. It makes a natural base camp for Old Tunnel visitors. Most area RV parks are clustered along US-290 east and west of town.
Top Hosts near TX, United States
Matt was a fantastic host and ensured everything went smoothly! The RV was clean and spacious and the master bed was very comfortable.
Laurin M. - Aug 2026
Matt was great to deal with. Answered all questions we had. Camper comes with most everything you will need. All around good experience.
Blake D. - Jun 2026
Easy to work with Trailer was clean and everything worked good.
Michael S. - Jul 2026
Kristen was a fantastic host. We arrived to everything set up and hooked up. The RV was clean and clean linens and towels were on the beds. The outdoor kitchen was perfect for breakfast and the outside fridge was used constantly. Communication was amazing. We had a flight cancelled and Kristen made it work so we didn't miss a thing.
Chris S. - Mar 2026
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RV Rentals Old Tunnel State Park
Old Tunnel State Park, TX, United States
How to get to Old Tunnel State Park
Old Tunnel State Park sits along Old San Antonio Road, about a 15 minute drive south of Fredericksburg and roughly 75 miles (about 1.5 hours) northwest of San Antonio via I-10 and US-87. Austin is about 85 miles east, around two hours by RV. The final approach follows narrow, winding Hill Country ranch roads with some tight curves and grades, so large motorhomes should take their time and avoid after-dark arrivals. The nearest major airport for fly-and-rent travelers is San Antonio International Airport (SAT); Austin-Bergstrom (AUS) is a secondary option.
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