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Natural Bridge Caverns Half Marathon

location_on

San Antonio, Texas, United States

calendar_today 08 Feb, 2026

directions_run Running

sell $55.00 – $120.00

About the Event

Begin your extraordinary journey deep beneath the earth's surface at the unparalleled Natural Bridge Caverns Trail Run on February 8, 2026. This is not merely a trail race; it is an immersive expedition starting in the stunning underground chamber of Texas's largest caverns. Feel the cool, ancient air and witness breathtaking crystal formations as you prepare to race from the depths onto the scenic Hill Country terrain above. Choose your challenge among the diverse Half Marathon, 10K, or 5K routes, each offering a unique blend of subterranean wonder and rugged Texas landscape.

Experience the thrilling contrast of moving from majestic underground rooms to sun-drenched jeep trails and challenging hills that define this iconic course. Secure your spot in a truly singular running event where the start line is an attraction in itself, located within the awe-inspiring Pluto's Anteroom. It's a celebration of natural beauty, personal endurance, and adventure that you simply cannot find anywhere else. Prepare for an unforgettable day capped with exclusive perks, delicious food, and the profound satisfaction of conquering a legendary route. This race promises memories as enduring as the ancient rock formations you'll run past, making it a must-do for every adventurous runner's calendar.

Races Offered

Half Marathon

Feb 08, 2026

straighten

Distance — 21.1K

terrain

Type — Running

timer

07:00

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$120.00

10K

Feb 08, 2026

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Distance — 10K

terrain

Type — Running

timer

07:30

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$79.00

5K

Feb 08, 2026

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Distance — 5K

terrain

Type — Running

timer

08:15

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$55.00

Weather Overview

These values represent the 3-year monthly averages for February in San Antonio.

Temp (°C)

Feels Like (°C)

thermostat 9.7° / 21.6°

wb_sunny 6.9° / 19.5°

Wind (km/h)

Humidity (%)

air 11.8 /

water_drop 67.9%

Temp (°C)

Feels Like (°C)

Wind (km/h)

Humidity (%)

thermostat 9.7° / 21.6°

wb_sunny 6.9° / 19.5°

air 11.8 km/h

water_drop 67.9%

About San Antonio

Learn more about the host city, San Antonio.

San Antonio is the second largest city in the state of Texas and the 7th largest in the United States. It's the 24th largest metropolitan area in the country. Visited by more than 31 million annual visitors, San Antonio is a beautiful city at the axis of three different geological terrains: Hill Country, South Texas Plains and Prairie and Lakes. There's a lot to do in this city: fine art museums, historical missions and plenty of amusement parks in addition to great dining and lots of drinking. The culture and people are vibrant and interesting. San Antonio's downtown is one of the most lively in the nation.

Hotels & Places to Stay

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Registration Discount

Use the promo code below during registration to save on entry fees.

15% OFF

Promo code RUN26

*Promo codes are collected from publicly available sources. We are not affiliated with, sponsored by, or endorsed by any brand listed. All trademarks belong to their respective owners. Offers may expire or change without notice.