Castle Rock Trail Festival

OCT
3
2026
A multi-distance trail event on the Castle Rock ridgeline featuring a family obstacle run plus 5K, 10K, half marathon and 50K. Timing, aid stations, shirts and medals are provided and the course reaches about 6,700 feet.
Sat 3 Oct 2026
50 kilometers Half Marathon 10 kilometers 5 kilometers

Always double-check with the organizer's website! This page may contain affiliate links.

Castle Rock Trail Festival / liveBIG Run

The Castle Rock Trail Festival takes place on the town ridgeline trail system and uses trails in Philip S. Miller Park and Ridgeline Open Space. The event offers multiple course options and a family obstacle run for children.

Distances and options include:

  • liveBIG Family Adventure Run family obstacle course for children ages 5 to 12
  • Philip S. Miller 5K
  • Ridgeline 10K
  • Ridgeline Trail Half Marathon
  • Ridgeline 50K

Event features for participants include an event T-shirt and finisher’s medal, professional chip timing with a disposable bib chip, and free photo downloads after the event. Aid stations will provide bottled water and basic first aid; selected aid stations will also offer electrolytes. Finish line beverages include water, Gatorade and beer.

The 50K ultramarathon has an eight hour time limit. A drop bag tent is available near the start of the second loop, close to the finish area, for competitors in longer races. Awards are presented for overall male and female finishers and for age group placings in races 5K and up.

The course reaches a high point of 6,700 feet. Weather can vary in early October and trails may be wet or muddy. Wildlife such as rabbits, prairie dogs, deer, fox, coyote and birds may be encountered on the open space trails. Visit the organization's website for the most recent information.

50 km
Ridgeline 50k
Half Marathon
Ridgeline Trail Half Marathon
10 km
Ridgeline 10k
5 km
Philip S. Miller 5k
Livebig Family Adventure Run
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