Endure Trail Runs
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Event
The Endure Trail Runs, presented by Human Potential Running Series, takes place on May 16, 2026 at the Pisgah Point Group Camping Area in Mueller State Park, Divide, CO. The event has a combined runner capacity of 225. Distances and event formats include:
- 12-Hour (timed event using colored-ball loop selection)
- Marathon
- Half Marathon
- 10k
The 10k, Half Marathon, and Marathon have an 11-hour cutoff. The event was formerly known as The Tommyknocker 12-Hour and Mine Shaft Half.
Course and logistics
All courses use double-track and single-track trails with zero pavement. The main aid station is located at the Pisgah Point Group Camping Area and serves as the start/finish. The aid station is stocked with water, electrolyte drink, assorted ultra snacks, and provides drop bag access.
The 12-Hour format: runners draw colored balls to determine the next loop; loops are marked with matching flagging tape. A black ball gives the runner either a 15-minute time out or a task administered by a task master. Completed tasks can earn override tickets to change future loop choices. Each runner’s result in the 12-Hour is the total miles recorded during their participation.
On-site tent camping is allowed with limited vehicle/camper space; trailers and roof-top tents are not permitted. Vehicles entering the park must meet Colorado State Parks entry requirements or pay the park fee. Average temperatures listed are high 57°F and low 32°F; mountain weather can be variable. Finisher items include a gender-specific race shirt and finisher’s medal, subject to availability. Visit the organization's website for the most recent information.
