Endure Trail Runs
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Event overview
The Endure Trail Runs at Mueller State Park (Pisgah Point Group Campground, Divide, CO) includes the following race options:
- 12-Hour (two variants listed: Tiny Balls and Endure - LMS)
- Marathon
- Half Marathon
- 10k
The event has a combined runner capacity of 225. The 10k, Half Marathon, and Marathon have an 11-hour cutoff. All courses use double-track and single-track trails with zero pavement. A single main aid station at the Pisgah Point Group Camping Area serves as the start/finish and offers water, electrolyte drink, assorted ultra-style snacks, and drop bag access.
Format, logistics and key rules
The 12-Hour format uses colored balls drawn from a bucket to determine each loop; loops are marked with matching colored flagging tape and miles are recorded after each loop. A drawn black ball gives the runner the option of a 15-minute time out or a task with a Task Master; completing the task can earn an override ticket to exchange a future loop color. Balls for longer loops may be removed as the event progresses. Runners who complete at least one loop in the 12-Hour, or who finish the 10k or Half Marathon, receive a finisher's award; awards will not be mailed. Check-in is handled at the start/finish location with pick-up available the evening before and on race morning. Tent camping on site is allowed with limited spaces and restrictions; only registered runners may camp in the reserved group campsites. Parking must meet Colorado State Parks entry requirements or a park entry fee applies. Registration opens December 1, 2025. Visit the organization's website for the most recent information.