Endure Trail Runs
Sat, May 16, 2026, 8:00 AM MDT
- Location
- Divide, CO
- Mueller State Park - Pisgah Point Group Camping Area, 21045 CO-67, 80814
- Type
- ULTRA
Sign up and verify details on the organizer’s official page.
Profile in progress
More event insights are on the way. Additional race details are being prepared—check back soon, and always confirm timing and logistics on the official registration page.
Distances & registration
5 optionsRegistration for all distances is through the official signup link above.
- 6.81 Miles
Sat, May 16, 9:00 AM MDT · From $64.60
Opens Nov 30, 2025, 7:00 PM MST · Closes Dec 7, 2025, 6:59 PM MST
- 14.12 Miles
Sat, May 16, 9:00 AM MDT · From $75.20
Opens Nov 30, 2025, 7:00 PM MST · Closes Dec 7, 2025, 6:59 PM MST
- 26.53 Miles
Sat, May 16, 8:00 AM MDT · From $107.00
Opens Nov 30, 2025, 7:00 PM MST · Closes Dec 7, 2025, 6:59 PM MST
+ 2 more optionsHide
12-Hour (Tiny Balls)
Sat, May 16, 8:00 AM MDT · From $128.20
Opens Nov 30, 2025, 7:00 PM MST · Closes Dec 7, 2025, 6:59 PM MST
12-Hour (Endure- LMS)
Sat, May 16, 8:00 AM MDT · From $128.20
Opens Nov 30, 2025, 7:00 PM MST · Closes Dec 7, 2025, 6:59 PM MST
The course
- —
Difficulty
Serious Test
Serious Testaltitude
marathon distance, mountainous area, very high altitude, typically mild weather
- High altitude
Based on typical seasonal and area patterns — not a course map or official forecast.
From the organizer
The Human Potential Running Series Presents: The Endure Trail Runs @ Mueller State Park
The Endure 12-Hour is a one-of-a-kind 12-Hour timed event designed by YOU… and tiny colorful balls. Each runner will pull colored balls from a bucket, which determines the loop they’ll next run. This continues for up to 12 hours; the runner’s result is the miles they ran within the allotted time. Y ou are not required to run for all 12 hours , as your final result is the number of miles you ran within the time you participate!
The 10k, Half Marathon, and Marathon are great ways to enjoy Mueller State Park’s natural beauty in a supportive, “no-pressure” environment. All three distances feature a generous 11-hour cutoff.
All courses feature double-track and single-track trails with ZERO pavement, and an aid station you’ll want to hang around at for hours (we’re that much fun)!
Formerly Known As The Tommyknocker 12-Hour & Mine Shaft Half
Also in this area
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Lower-difficulty races in the same state.