Castle Rock Trail Festival and liveBIG Run

Come run Castle Rock’s newest 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. 7! This year's event has everything to offer from ultra-distances to the liveBIG Family Adventure Run:

  • 50k ultramarathon
  • Marathon
  • Half marathon
  • 10K
  • 5K
  • Family adventure race
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. 

Thanks to everyone who participated.  Click here for race results.

Course options and fees

 liveBIG Family Adventure Run
$35 - family of four (does not include shirts)
$45 - family of four on race day (does not include shirts)
$5 - per shirt
$5 - per additional family member
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 

Location


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

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
noon Live concert from John Adams: A tribute to John Denver
4 p.m. Finish line closes

Race Features


  • All participants in the trail races will receive a custom technical shirt in gender specific sizing. Shirts for the Family Adventure Run are $5 per shirt
  • 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
  • Live band, John Adamd: A tribute to John Denver, will on the stage starting at noon
  • The Family Adventure Run is an untimed family event and does not include shirts or timing chips. Shirts may be purchased for $5. Family Adventure participants will receive finisher medals. 

Race maps


Course maps