Natural Bridge Caverns Trail Run
San Antonio, TX
- Half Marathon, 10K, 5K
- Trail (Unpaved)
- Official race website
Experience the Only Race in Texas that Starts in the Belly of a Cave! Join us for a one-of-a-kind adventure through Texas’s largest caverns as you descend deep into the earth and race through Pluto’s Anteroom. This is not just a run; it’s an exhilarating journey through the breathtaking Natural … MORE
Local Historical Weather (Feb 08):
| 2026 | 2025 | 2024 | 2023 | 2022 | |
| H (°F) | 79 | 89 | 74 | 65 | 66 |
| L (°F) | 47 | 68 | 59 | 44 | 31 |
Find Nearby Lodging (hotel, rental, etc.):
Cavern, cold temps, and cow-pies!
Race starts about half mile inside a cave. You get to wait for the race to begin in the visitor center, it’s heated with public restrooms. You can park in … MORE
Race starts about half mile inside a cave.
You get to wait for the race to begin in the visitor center, it’s heated with public restrooms. You can park in the lot right out front; so a very easy race start.
The weather was perfect. Mid 40’s with frost in the valleys. Race starts right at sunrise so wonderful view. The race is a mixture of paved road 10%, gravel or grass road 50%, grassy field 20%, and the rest is rocky/loose/ankle twisting fun at every step. There are some minor hills and one steep section that is a few hundred yards. Wear your trail shoes! Course was almost perfectly marked, except mile 11-12 were there was a long gap between arrows/flagging. Water stops were on point and staff was friendly at every turn. There are no spectators (closed course) but runners were cheering each other on!
Finisher metal was a cool geode, shirt was just a regular T-Shirt, they gave you some cotton gloves, and a ticket to come back to the cave for a year. I liked this races as it was a little hard, a little different, and a lot of nice scenery and people.