Endure Trail Runs

MAY
16
2026
Trail races at Mueller State Park include 10k, half marathon, marathon, and two 12 hour formats. Courses are single and double track with no pavement and a main aid station at Pisgah Point.
Sat 16 May 2026
10k Half Marathon Marathon 12-Hour (endure- Lms) 12-Hour (tiny Balls)

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Endure Trail Runs at Mueller State Park

The event program features multiple trail distances held at the Pisgah Point Group Campground in Mueller State Park, Divide, CO. Distances include:

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

All marked courses use double track and single track trails with zero pavement. The 10k, Half Marathon, and Marathon share an 11 hour cutoff. A single main aid station is located at the Pisgah Point Group Campground and provides water, electrolyte drink, assorted ultra snacks, drop bag access, and serves as the start and finish location.

The 12 Hour Tiny Balls format has runners draw colored balls from a bucket to determine the next loop; loops are flagged to match the ball color and miles are recorded as runners complete loops within the allotted time. A black ball offers a 15 minute timeout or a task challenge that can earn an override ticket. The 12 Hour Endure LRS event uses two ping pong ball draws to set the next loop and the slowest allowable pace for that loop; LRS stands for Last Runners Standing and only those on the line at loop start remain eligible.

The combined runner capacity is limited to 225. Camping on site is restricted to registered runners with limited spaces and specific vehicle rules. Participants must meet Colorado State Parks entry requirements or pay the park entry fee. Weather in the mountains can be variable; average temperatures are about 57°F high and 32°F low. Visit the organization's website for the most recent information.

12 hr
12-Hour (endure- Lms)
12 hr
12-Hour (tiny Balls)
Marathon
Marathon
Half Marathon
Half Marathon
10 km
10k