Endure 12 Hour, 24 Hour, and Half Marathon
Teller County, Colorado, United States
May 16, 2026 - Saturday
Half-marathon, 12hr, 24hr
Race Information
The Endure 12-Hour is a one-of-a-kind challenging 12-Hour timed event, designed by YOU… and tiny colorful balls. Runners pull colored balls from a bucket, determining the loop they’ll next run. This continues for up to 12 hours, and the runner’s result is the number of miles they ran within the allotted time.
The Endure 24-Hour is a one-of-a-kind challenging 24-Hour timed event, designed by THE COLLECTIVE… and tiny colorful balls. In this event, the 12-hour event meshes with The Last Man Standing type of event. Your task is to endure the full 24 hours with others. Two balls will be pulled before each loop. The first determines the colored loop the entire field will run, and the second determines the slowest possible pace that it can be completed.
The Half Marathon is a great way to get out and enjoy the natural beauty of Mueller State Park in a supportive “no-pressure” environment and features a generous 12-hour cutoff.
The courses are double-track and single-track trails with ZERO pavement and an aid station you’ll want to hang around at for hours!
Related Events
Mainly Marathons Southwest Series - Day 2
Date: Nov 9, 2026 - Monday
Size: 1 - 100 participants
Location: Durango, Colorado
Spirit Trail Run
Date: May 24, 2026 - Sunday
Size: 100 - 500 participants
Location: Buena Vista, Colorado
Snow Mountain Ranch Trail Running Festival
Date: Sep 12, 2026 - Saturday
Size: 100 - 500 participants
Location: Grand Lake, Colorado
Destination Run Pick of the Month - La Jolla Half Marathon, 10K and 5K
Get ready for San Diego’s most picturesque and beautiful point-to-point races - La Jolla Half Marathon, 10K and 5k, taking place on May 16, 2026.
Use code RGCC18 to SAVE 18% on your race entry!
Whether you choose the Half Marathon, 10K or the 5K, the course gives you the best of Southern California: sweeping ocean views, cliffs that make you look twice, and that iconic stretch through Torrey Pines where the landscape opens up and reminds you why you love to run.
The finish line isn’t just a destination; it’s a celebration! Enjoy the vibrant festival atmosphere filled with music, delicious food, and vendors showcasing the latest running gear. Relax with complimentary recovery options like massages, cold plunges, TENS units, and massage chairs.
Every runner gets a finisher’s medal, race shirt, tote bag, food bag, and free race photos, so you can keep every smile, stride, and moment of victory.
Discover what makes running in San Diego truly special—register today!
Free Plan for Beginner Runners
Receive a FREE training plan for beginner runners from our friends at None to Run
Are you looking to become a runner for the first time? Coming back to running after a hiatus? Our friends at None to Run have created a training plan for beginner runners
The None to Run Beginner Plan is super gradual and achievable, no matter your starting point.
In 12 weeks, you’ll be able to run 25 minutes non-stop...and actually enjoy it!
Click the button below to get your free training plan.
🏃 Looking For More Runs Near Colorado?
Find another distance:
Race Facts
Race Size: 100 - 500
Elevation: Fast and Flat
Course Type: Trail
Boston Qualifier: No
Kids Run: No
Where to Stay
Use this map to find hotels and airbnb accommodation near this race location.
