Castle Rock Trail Festival / liveBIG Run

Come run Castle Rock’s favorite trail race at the beautiful Philip S. Miller Park! The Castle Rock Trail Festival combines the liveBIG Run and Ridgeline Trail Races on Saturday, Oct. 5! The annual event has everything to offer from ultra-distances to the liveBIG Family Adventure Run:

  • 50k ultramarathon
  • Marathon
  • Half marathon
  • 10K
  • 5K
  • Family Adventure Run

Register for the Castle Rock Trail Festival / liveBIG Run

Race details

The race will begin at the Amphitheater at Philip S. Miller Park and wind through the single and double-track trails at Philip S. Miller Park and Ridgeline Open Space. Don’t forget to take in the impressive views of the surrounding buttes and the scenic views of Castle Rock as the trail twists and winds over the flowing race course. 

Both the 5K and the Family Adventure Run are hosted by the Town of Castle Rock in support of Castle Rock's Adaptive Recreation Program. Money raised will go to provide scholarships for special needs families to participate in a wide variety of events throughout the year. 

Learn more about Adaptive Recreational

Parking for this event

If you want to avoid the crowd, we have made arrangements for overflow parking / shuttles at the Upper Lot at the Douglas County Fairgrounds. The trolley will be making continuous loops throughout our parking lot and then to the Fairgrounds and dropping off at the Amphitheater. We will have signage at the Fairgrounds on where to wait for the trolley.

Location

The race is staged from Philip Miller Park in Castle Rock, 1375 W Plum Creek Parkway.

Course options and fees

 liveBIG Family Adventure Run
$15 - through June 30
$20 - July 1 through Sept. 15 
$25 - after Sept. 15
$30 - on race day
liveBIG 5K
$20 - through June 30
$25 - July 1 through Sept. 15
$30 - after Sept. 15
$35 - on race day
Ridgeline 10K
$30 - through June 30
$35 - July 1 through Sept. 15
$40 - after Sept. 15
$45 - on race day
Ridgeline Trail Half Marathon
$50 - through June 30
$55 - July 1 through Sept. 15
$60 - after Sept. 15
$65 - on race day
Ridgeline Trail Marathon
$80 - through June 30
$85 - July 1 through Sept. 15
$90 - after Sept. 15
$95 - on race day
Ridgeline 50K
$80 - through June 30
$85 - July 1 through Sept. 15
$90 - after Sept. 15
$95 - on race day 

Race Day Event Timeline

7 a.m. Packet pickup and registration begins at race site
8 a.m. 50K and Marathon race start
8:30 a.m. Half Marathon race start
9 a.m. 10K race start
9:30 a.m. 5K race start
10:30 a.m. Family Adventure Run start
4 p.m. Finish line closes

Race Features


  • All participants in the races will receive a custom technical shirt in gender specific sizing. 
  • All finishers will get a custom made finisher medal
  • Music at the start and finish will create a party-like atmosphere
  • Professional chip timing with a disposable bib chip
  • Free professional photo downloads after the event, sponsored by Sporthill
  • Indulge in cookies, muffins, oranges, bananas, and bagels with pizza (starting at 10:30 a.m.) at the post race party
  • Runners and walkers welcome
  • Gift certificate awards from RNK Running in Parker
  • Fully supported course with up to 11 aid stations in the 50K
  • The Family Adventure Run is an untimed family event and does not include timing chips. Family Adventure participants will receive finisher medals and t-shirts. 

Race maps



Learn more about the course maps.