Great Springs Trail Race - Natural Bridge Caverns
- Date
- September 26, 2026
- Distance
- GSTR - Natural Bridge Caverns - LPS Run (Last Person Standing Run) · GSTR - Natural Bridge Caverns - LPS Ruck (Last Person Standing Ruck) · GSTR - Natural Bridge Caverns - 16mi & more
From the Organizer
Saturday, September 26, 2026.
Join us for our most unique race ever! Starting in the Natural Bridge Caverns, which is part of the Comal Caverns network, this race kicks off with breathtaking views of the world below our feet as the start line is in the depths of the Natural Bridge Caverns. Once you emerge to the sunshine of a beautiful day, you’ll wind your way through beautiful trails over flowing hills and through wooded sections. You can choose from 4 to 16 miles distance or go big with the Last Person standing format.
Natural Bridge Caverns in San Antonio.
This race is made possible by the great work of Great Springs Project. Don’t know what that is yet? Check out this link or just come to the race and learn how the Edwards Aquifer under these trails is critical to sustainable clean water for our growing cities. We are incredibly proud to support their grandiose efforts, alongside the city of San Antonio via this trail race!
While every racer will get some cool swag, September 1 is the deadline to get a shirt.
Click Here for Tejas Trails Policies (you really do want to know this stuff)
Events
Weather
Typical Conditions
It's too far out for a forecast, so here's what weather on this date is normally like in the area. A race day forecast will replace this as race week approaches.
Typical High
87°
Typical Low
66°
Chance of Rain
26%
Based on US Climate Normals data from San Antonio Incarnate Word, 2 mi from the venue.
Host City
About San Antonio, TX
Population
1,458,954
as of 2023
Elevation
781 ft
Nearest Airport
SAT
San Antonio International Airport · 5 mi
Time Zone
Central Time
From Endurance Grid
A big city race. Expect multiple lodging options and plenty to do the day before.
Race Location
Your Next Start Line
What Are You
Waiting For?
Every finish line starts with a single decision. Claim your spot at Great Springs Trail Race - Natural Bridge Caverns, put it on the calendar, and turn “someday” into a start date.
110
Days to train
- Race
- Great Springs Trail Race - Natural Bridge Caverns
- Date
- September 26, 2026
Coming Up
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From Endurance Grid
About This Sport
Endurance Grid is here to help you understand the sport, decide if it's the right fit, and learn how to prepare. For course distances, logistics, and race-day specifics, always defer to the race organizer's event page.
With running, there's a distance for every fitness level, a community at every start line, and nothing beats the feeling of crossing a finish line you trained for.
Running is an endurance sport that rewards consistency, and showing up every week compounds in ways that will surprise you.
Running
From 5K to marathon, running races are the most accessible entry point into endurance sport. There's a distance for every fitness level and a community at every start line.
Frequently Asked Questions (FAQs)
- What is the Great Springs Trail Race - Natural Bridge Caverns?
- Great Springs Trail Race - Natural Bridge Caverns is a running race held in San Antonio, Texas on September 26, 2026. It is one of the many endurance events listed on Endurance Grid, a multi-sport endurance event calendar covering running races, triathlons, HYROX, and more endurance sports across the United States. Find more running races near you or explore our sports guides to learn what race day actually feels like.
- When and where is the Great Springs Trail Race - Natural Bridge Caverns?
- Saturday, September 26, 2026 in San Antonio, Texas at 26495 Natural Bridge Caverns Rd., San Antonio, TX. Check the event page for exact start times and wave schedules.
- How do I register for the Great Springs Trail Race - Natural Bridge Caverns?
- Registration is handled through the event's registration page. Confirm pricing and distances there, and sign up.
Great Springs Trail Race - Natural Bridge Caverns
Sep 26, 2026