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Castle Rock Trail Festival

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Come run Castle Rock’s best trail race at the beautiful Phillip S Miller Park! The event will offer six races: a 50k ultramarathon, a marathon, a half marathon, a 10K, a 5K and a family adventure race. The event will highlight the soft surface trails that are a part of the town’s largest ever park project. The race will begin near Castle Rock’s state-of-the-art Miller Athletic Complex, a beautiful $30 million venue. The race course will showcase the trails in Phillip S Miller Park and the adjacent 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. If you have any energy left after your race, you can climb Challenge Hill, a 200-step staircase on the hillside near the finish line.

How to enter the Castle Rock Trail Festival

  1. 50K

    Run 50km
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  2. Marathon

    Run 26.2mi
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  3. Half Marathon

    Run 13.1mi
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  4. 10k

    Run 10km
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  5. 5k

    Run 5km
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  6. Family Adventure Race

    Run 1.5mi
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Castle Rock Trail Festival routes

The Castle Rock Trail Festival course is located entirely within the confines of Philip S Miller Park and Ridgeline Open Space in Castle Rock, CO.

Starting near the amphitheater at PS Miller Park, the course travels along the yellow and purple trails before crossing a pedestrian bridge to the Ridgeline Open Space. Here, runners will circumnavigate the perimeter of the Rigeline Trail counterclockwise before returning to the pedestrian bridge. Once back in PS Miller Park, runners will continue on the yellow trail. Half Marathon, 10K and 5K runners will finish at the start line while 50K runners will get to experience the red and green trails within PS Miller Park.

The 50K runners will run two full loops of the course while the marathon runners will run two loops of the half marathon course.

The entire course is run on entirely on dirt single and double track trails. The Ridgeline Trail 50K, Marathon, Half Marathon, 10K and the LiveBIG 5K are challenging courses with a lot of short ups and downs, twists and turns and some roots mixed in to test your ankles. There will be 11 aid stations in the 50K and marathon, six aid stations in the half marathon and two aid stations in the 10K. There is only one aid station in the 5K and it is very close to the finish line. Each aid station will provide Gatorade, water and gels. 50K and marathon runners will also find a variety of food items, including pretzels, potato chips and fruit.

Family Adventure Run Obstacle Descriptions

The family adventure run will feature up to 13 possible obstacles. Here are a list of the possibilities.

  1. P.S. Miller Challenge Hill – 200 steps to the top of the ridge. A daunting task but you’ll love the views.
  2. Bubble Trouble – Nothing more satisfying than a spare bit of bubble wrap right? Crawl to the end and see how many you can squash on the way.
  3. Walk the plank – How’s your balance? Step up and make it to the end without falling!
  4. Mom, I’m TIREd – Knees up and one foot in each circle.
  5. Basic Training – Crawl under the flags, and thank your lucky stars it’s not real basic training or those flags would be barbed wire!
  6. SeeSaw – A ‘stay on your feet’ take on a classic playground toy. Extra points if you manage all 3 without falling off.
  7. Through The Rabbit Hole – Just like Alice.
  8. The Wall – Up and over, watch your footholds.
  9. Hurdles – Over is the preferred method but under works just as good.
  10. String Maze – OK, James Bond, see if you can make it to the end without touching a string.
  11. The Ladder – Just like The Wall……Up one side and down the other.
  12. HAY there! – It’s just not October without climbing a hay stack.
  13. Inflatable Obstacle Course – Test your speed against others in your group or just try to make it to the end on your feet.

Event Details

    All participants in the trail races will receive a custom technical shirt in gender specific sizing.
    All finishers will get a custom made finisher medal
    Music at the start/finish will create a party-like atmosphere
    Professional chip timing with a disposable bib chip (Adventure run is untimed)
    Professional photos taken during the event
    Indulge in snacks 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 on the amphitheater stage
    The Miller Activity Complex will be available for athletes and their friends and families for a reduced fee of $4 on race day, so that runners can shower if needed after the race or if support crews want to rest indoors.

Avoid The Rush!
Pre-race Packet Pickup and Registration
Thursday and Friday, October 3 & 4

11:00 AM to 7:00 PM

Race Day Packet Pick-up
You can also pick up your race packet on race morning before the race. Race day packet pick-up closes at the start of the last race.

Drop Bags:
We will have a 10’x10′ tent with a tarp on the ground under it at the start of the second loop of the 50K. This is located right near the start/finish line. You are more than welcome to take a bag to this location and leave it for the duration of the race.

Spectators are welcome!

  • There are no aid stations in the Family Adventure Run.
  • There is a restroom facility located just off the Ridgeline Trail about 3.5 miles into each loop.
  • We do allow dogs to run with runners. Please start at the back of the pack if you are running with your dog. All dogs within the park must be leashed at all times and dogs running with runners must be confined to a six foot leash or shorter. Failure to comply will results in a disqualification. There are no dogs allowed in the family adventure run.
  • Strollers are not permitted.
  • Headphones are discouraged as you may not be able to hear faster runners coming from behind you.
  • You may walk any distance, as long as you can finish within the 8 hour time limit for the 50K.

Weather & Safety Information:
We all know that weather in Colorado is day to day. The average low temperature in early October is 35 degrees and the average high is 65 degrees. At 6,400′, be prepared for anything. There may be snow on the trail, there may be rain, it may be muddy, and it may be nice. We will just have to wait and see what shows up on race day.

Philip S Miller Park and the Ridgeline Trail are multi-use open space trails that can see a lot of foot and bike traffic. However, in October, this traffic is fairly light. Expect to see wildlife in the form of rabbits, prairie dogs, fox, coyote, birds, and possibly bear and mountain lion.

Though this race is not considered high altitude for residents of Colorado. If you are traveling from elevations below 2,000′, be prepared for some shortness of breath. The high point on the course is 6,700′, about 700′ higher than Colorado Springs and 1,500′ higher than Denver.

Meet the organiser

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Colorado Runner Events is an event management company serving metro Denver. Whether you are a walker, beginner, weekend warrior, or an elite, we have races to help you perform your best. We currently produce multiple events with more than 10,000 participants annually. Our passion for running is transparent with each race that we produce. We aim to provide a unique experience in an unforgettable setting all while providing a great value to our participants. Come experience the Colorado Runner difference.


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