Endure Trail Runs

Endure Trail Runs at Mueller State Park

Endure Trail Runs takes place at Mueller State Park with the start and finish at the Pisgah Point group camping area. The event combines trail distances with two timed 12 hour formats and a combined runner capacity of 225.

Distances offered

• 10k
• Half Marathon
• Marathon
• 12-Hour (Tiny Balls)
• 12-Hour (Endure LRS)

All courses run on single-track and double-track trails with zero pavement. A main aid station is located at the Pisgah Point group camping area and provides water, electrolyte drink, assorted ultra snacks, and drop bag access. Drop bags are accessed at the start/finish aid station only.

The 12-Hour Tiny Balls format uses colored balls drawn from a bucket to determine each loop; runners record miles completed within the event time and need not run the full 12 hours. A black ball triggers either a 15 minute timeout or a task that can earn an override ticket. Runners who finish part of a loop after the 12 hour cutoff lose miles for that final loop but keep prior miles.

The 12-Hour Endure LRS uses ping pong balls to select the next loop and a pace ball to set the slowest allowable pace for that loop. Runners must return to the start/finish and be on the starting line for the next loop or be disqualified and placed into the traditional 12 hour results.

A mid race drop down is available for Half Marathon runners at the 10k point; they receive a finisher award and a 10k finish time if they choose that option.

Weather can be highly variable in the Colorado mountains. Average seasonal temperatures are listed as high 57˚ and low 32˚ with long daylight hours. Visit the organization's website for the most recent information.