Endure Trail Runs
Endure Trail Runs offers a unique timed event and classic trail races in Colorado's Mueller State Park.
Race Date
May 15, 2027
Location
Divide, CO
Quick facts
- Date
- Saturday, May 15, 2027
- Location
- Divide, Colorado
- Distance
- Half marathon (13.1 mi) + 6.81 Miles, 26.53 Miles, 12-Hour (Tiny Balls), 12-Hour (Endure- LMS)
- Course
- Loop Course
- Terrain
- Trail
- USATF certified
- Not listed
- Finishers on record
- 14
Highlights
Good For
Atmosphere
Course
The Experience
Set within the scenic Mueller State Park near Divide, Colorado, the Endure Trail Runs present a unique challenge for trail enthusiasts. The event, now in its seventh year, hosts a variety of distances including a 10k, half marathon, marathon, and a distinctive 12-hour timed event.
The half marathon, along with other timed and distance races, utilizes a mix of double-track and single-track trails, offering a true trail running experience with no pavement. Runners can expect a supportive, low-pressure environment, with a generous 11-hour time limit for the half marathon and marathon. An aid station is noted for its fun atmosphere, encouraging camaraderie among participants.
This event draws runners from approximately four states, with a repeat-runner loyalty rate of about 21%. The combined runner capacity for all events is 225, contributing to an intimate, community-focused atmosphere. Participants receive an Endure Race T-shirt as part of their entry.
Race-provided description
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
Logistics
Race Day
Saturday, May 15, 2027
Start Time
9:00 AM
Giveaway
Endure Race T-Shirt
Start Location
Mueller State Park - Pisgah Point Group Camping Area, Divide, CO, 80814
Course Info
Course Type
Loop Course
Terrain
trail
Scenery
Park, Mountain
Surface
Dirt Trail
Difficulty
Rolling Hills
Net Drop/km
0 m (Flat)
Separation
0.0%
Also Offers
Course Map
Quality Score
Standout626 years running
~46 finishers a year
small race — neutral
21% returning runners
4 timing sources · 3 photos
runners from 4 states
no winner time yet
typical high 63°F
Race Day Weather
5-year historical avgStart (Low)
40°
Afternoon (High)
64°
Pleasant conditions — light layers at start, comfortable by finish
0.1"
Precipitation
11 mph
Wind
58%
Humidity
Historical Finish Times
How 14 finishers actually crossed the line across 6 years.
Most recent
2026
Total finishers
14
Median time
~3:25
Latest turnout
—
States
15
Turnout by year
2016–2026
Hover the histogram to inspect specific finish times.
Race Photos
Frequently asked
When is the Endure Trail Runs?
The Endure Trail Runs is held on Saturday, May 15, 2027, starting at 9:00 AM.
Where does the Endure Trail Runs take place?
It takes place in Divide, Colorado.
What distances does the Endure Trail Runs offer?
The half marathon (13.1 miles), plus 6.81 Miles, 26.53 Miles, 12-Hour (Tiny Balls), 12-Hour (Endure- LMS).
Is the Endure Trail Runs course flat and good for a PR?
The Endure Trail Runs is a rolling hills, loop course course.
How many people run the Endure Trail Runs?
HalfRuns has finish records for 14 runners who have completed the Endure Trail Runs.
HalfRuns editorial — independent, no paid placement.
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