In 195 days · Sat, May 15, 2027
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Saturday, May 15th, 2027
Mueller State Park - Pisgah Point Group Camping Area, Divide CO
1 Mile
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
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. You 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
Course map
Train with a club
Run clubs near Divide to train with before race day.
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