Divide, CO | Saturday, May 16, 2026Registration Closed
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
Available Distances
Awards & Prizes
Participant Giveaway
6.81 Miles: Endure Race T-Shirt
14.12 Miles: Endure Race T-Shirt
26.53 Miles: Endure Race T-Shirt
12-Hour (Tiny Balls): Endure Race T-Shirt
12-Hour (Endure- LMS): Endure Race T-Shirt
Registration & Pricing
Distance
Price
Opens
Closes
6.81 Miles
$60.00
Dec 1
Dec 8
$80.00
Dec 8
Mar 1
$90.00
Mar 1
May 13
14.12 Miles
$70.00
Dec 1
Dec 8
$90.00
Dec 8
Mar 1
$100.00
Mar 1
May 13
26.53 Miles
$100.00
Interested in this race?
Dec 1
Dec 8
$120.00
Dec 8
Mar 1
$130.00
Mar 1
May 13
12-Hour (Tiny Balls)
$120.00
Dec 1
Dec 8
$140.00
Dec 8
Mar 1
$150.00
Mar 1
May 13
12-Hour (Endure- LMS)
$120.00
Dec 1
Dec 8
$140.00
Dec 8
Mar 1
$150.00
Mar 1
May 13
RACE DAY REGISTRATION WELCOME!
Online registration for the 2026 Endure Trail Runs is now closed. We do welcome Race Day Registration as we'll have plenty of room. Please interact with pre-race communications so that you know where to go and what to expect. Here are the main items: If you don't have a Colorado State Parks pass (any kind) or one of the approved plate that afford free entry into Colorado State Parks, you'll need to pay the $10 day use fee at the park entrance gate on the way into the event. Pre-Race