In 250 days · Sat, May 15, 2027
Don't let race day sneak up
One email during race week. That's it.
When
Saturday, May 15th, 2027
Where
Mueller State Park - Pisgah Point Group Camping Area, Divide CO
Distances
1 Mile
Typical weather
31–52°F · some rain risk
See last 10 years
On this date: rain 3 of the last 10 years
2026
43–65°F
dry
2025
26–48°F
dry
2024
32–48°F
dry
2023
33–53°F
rain
2022
41–64°F
dry
2021
30–55°F
dry
2020
33–52°F
dry
2019
36–59°F
rain
2018
35–56°F
rain
2017
44–58°F
dry
Best months to race in Colorado →
About this race
The Human Potential Running Series Presents:
The Endure Trail Runs @ Mueller State Park
Event Details
- Date: 2027-05-15
- Location: Mueller State Park - Pisgah Point Group Camping Area, Divide, CO
- Race URL: Endure Trail Runs Registration
12-Hour Timed Event
- Unique Concept: The Endure 12-Hour is designed by YOU… and tiny colorful balls.
- Loop Determination: Each runner will pull colored balls from a bucket to determine their next loop.
- Participation: You are not required to run for all 12 hours.
- Final Result: Your result is the number of miles you ran within the time you participate!
Other Distances
- Options Available: The 10k, Half Marathon, and Marathon.
- Environment: Enjoy Mueller State Park’s natural beauty in a supportive, “no-pressure” environment.
- Generous Cutoff: All three distances feature an 11-hour cutoff.
Course Features
- Trail Types: All courses feature double-track and single-track trails with ZERO pavement.
- Fun Aid Station: An aid station you'll want to hang around at for hours (we’re that much fun)!
Event Rebranding
- Former Name: Formerly Known As The Tommyknocker 12-Hour & Mine Shaft Half.
Course map
Hotels for race weekend
Live prices near the start line, May 14 – 16, 2027.
Train with a club
Run clubs near Divide to train with before race day.
See all run clubs near Divide →
Suggested Races
Organize this race?
Claim it free to manage your listing — and get it featured for free, while spots last.