Castle Rock Trail Festival

Castle Rock, United States • 3 Oct 2026

Castle Rock Trail Festival / liveBIG Run

The Castle Rock Trail Festival offers multiple trail events on the town ridgeline and in Philip S. Miller Park and Ridgeline Open Space. Event options range from a family friendly liveBIG adventure run to longer trail races including a 50K ultramarathon.

Distances include:

  • liveBIG Family Adventure Run
  • Philip S. Miller 5K
  • Ridgeline 10K
  • Ridgeline Trail Half Marathon
  • Ridgeline 50K

All participants receive an event T shirt and finisher’s medal. Professional chip timing is used with a disposable bib chip. Free event photos are provided after the races and post race refreshments are offered at the finish area. Race day registration is available and fees increase by $15 for all races except the Family Adventure Run. Proceeds from the liveBIG race support the Town’s Therapeutic Recreation Program.

The 50K ultramarathon has an eight hour time limit. Aid stations will provide bottled water and basic first aid items; aid stations at Philip S. Miller Park and at numbers 4 and 12 on the Ridgeline side will also offer electrolytes. A 10 by 10 foot tent near the second loop start is available for drop bags during the 50K. Awards are given overall and by age group for races 5K and up with specified age categories for the half marathon, 10K and 50K. Visit the organization's website for the most recent information.

Race 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
Visit the organization's website for the most recent information.
Trail runs nearby

A trail ultramarathon in Buffalo Creek, Colorado offering 50 mile and 50K courses on mostly singletrack through burned areas and ponderosa forest. Portions of proceeds support the North Fork Volunteer Fire Department and local groups.

A trail race in Parker CO on May 31, 2026 featuring a Dipsea-style staggered start for the 10k, a steep stepped incline, rolling singletrack, and a kids 1 mile route to the top and back down.

Chase the Moon is an overnight fixed time trail event in Highlands Ranch, Colorado with solo 12, 6 and 3 hour races, a 50K and three and five person relays. Runners complete marked loops on dirt trails with aid stations and drop bag support..

A community trail event at JCC Ranch Camp on Saturday July 18 offering 5k and 10k trail options, sliding scale entry, on course water and clinic support, plus post-race tie dye and craft activities for finishers.

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