Endure Trail Runs - 12-Hour (Endure- LRS)
Also in this race
These events were grouped as one card in discovery—pick another distance or date without going back.
External Event
Distance
Unknown
Pace
All paces
Terrain
Road
Difficulty
All Levels
About this run
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
Typical conditions
For events around May 2027 in Divide, CO, United States: Typical spring conditions in this region — mornings can still be cool; confirm start-time guidance on the official page.
How to prepare
Trail events reward time on uneven surfaces and hills. Practice footing and bring the shoes and hydration the organizer recommends — details vary by race.
Find races near youGetting there
This event is listed in Divide, CO, United States. Confirm the exact start venue, parking, and transit options on the official registration page.
Registration is handled by the official event organizer
Know a local group? Host a community run in Divide
Also in this race
- May 15, 2027 · 1:00 PM
- May 15, 2027 · 1:00 PM
- May 15, 2027 · 1:00 PM (this one)
- May 15, 2027 · 2:00 PM
- May 15, 2027 · 2:00 PM




