September 1 - 30, 2020

A true trail run through the beautiful and

challenging Castlewood Canyon State Park,

south of metro Denver, Colorado.

REGISTRATION OPEN through September 30th

Limited to 300 Participants

BackgroundBackground & Venue

Castlewood Canyon is a hidden treasure for hikers and trail runners.The Park is a Colorado Natural Area providing abundant wildlife, plant, and geologic viewing opportunities. The theme of the Run, a surprising remnant of local history, is on display at the ruins of Castlewood Dam. This historic dam burst during a storm in 1933, sending a wave of water flooding into Denver.  Runners participating in the 10K run will pass this unexpected window to the past, as well as the historic Lucas Homestead site.

2020 marks the 7th annual Dam Run at Castlewood Canyon State Park


The Dam Run is a fundraising event.  All profits will benefit Castlewood Canyon State Park. Your participation will help us protect and preserve this special place in our community.

Have a Question?

Get More Information

BackgroundVirtual Run Distance & Timing

Choose your own course within the park, or run the traditional race course as described!

10K :  This run is long at approximately 6.5 miles. A true trail run with variety of terrain and nearly no asphalt.

5K :  This run is short at approximately 3.0 miles.

Both runs begin and end at the Canyon Point parking lot at Castlewood Canyon


Get Trail Map Here

Find Prior Years Results Here



Register online at

Park entrance fees are NOT included with registration.

When registering online, there may be a small processing fee added to the registration fee.


All finishers will be rewarded with a "Friends of Castlewood Canyon" buff! Stop by the visitor's center with your run results and claim your swag. Be sure to share your wildlife encounters and impressions of the trail while you're there. Post your best run pictures on Facebook and tag Castlewood Canyon State Park!


There are no refunds.


On your chosen run day, please enter at Castlewood Canyon State Park's main entrance which is located 5 miles south of Franktown on Highway 83. Your park entrance fee is NOT included in your race entry, so you will need to pay at the window. The start and finish lines will be at the Canyon Point parking lot. Proceed to the Canyon Point parking lot.  


Participants will park at Canyon Point parking lot.  If the Canyon Point parking lot is full, there are several smaller parking lots nearby. Please refer to the Castlewood Canyon State Park Map for more detailed information on location of parking lots. 

​​Course descriptions:

The 10K - This trail run is all about variety of terrain on the trails! A true trail run - no asphalt here! This challenging race starts and ends at the Canyon Point parking lot.  You will start at the Lake Gulch trail head and run down the Lake Gulch trail to the Dam trail where you will see remnants of the Castlewood Dam.  You will run up a steep incline to Rimrock where you will run along the rim of the canyon. Enjoy the views, but don't take your eyes off the trail for too long - running on the rim rocks is a little tricky! You will then head down a challenging and technical descent to Creek Bottom trail where you will cross Cherry Creek, run along the creek and past the beautiful waterfalls. You will then run back up the Dam trail to Inner Canyon trail, cross the creek and up steep steps to the finish line at the Inner Canyon trail head where we will be cheering for you.


The 5K - For the first 0.8 miles, runners in both events will share the course.  After crossing Cherry Creek at the bottom of Lake Gulch trail, 5K runners will turn right and enter the Inner Canyon trail. At 1.6 miles, after a steep ascent, 5K runners will emerge from the canyon and complete the remainder of the distance on the paved Canyon View Nature Trail.  For the final 0.2 miles, 5K runners will re-join the 10K course to finish in the same location.




Hikers are welcome on either course and are encouraged to be part of this year's virtual event!


• 5k Registration     $20.00    Expires 9/30/2020 4:00 PM
• 10k Registration   $25.00    Expires 9/30/2020 4:00 PM


NO dogs or strollers are allowed on either course.

Additional Information:

There will not be water on the trail. Please plan to self support your hydration needs. Water is available at the visitor center when entering the park.

The courses will not be marked. Bring a trail map and re-create the traditional courses on your own, or blaze a new course that you've always wished for.

For a more enjoyable Virtual Dam Run experience, plan your run for early mornings and weekdays.



  1. Runners may complete a course as many times as they would like, but only one uploaded time per participant will be allowed.

  2. Please bring your own face covering and hand sanitizer.

  3. Trail running is generally a solitary activity, but if running with companions, maintain separation of 6 feet.

  4. Covid-19 social distancing and safety procedures should be practiced at all times. Most of the park trails are single track and face coverings should be worn when passing other park visitors.

  5. Restroom facilities are available at the Visitor Center and at the Start/Finish line at the Canyon Point parking area.

  6. The following are general race event guidelines for the State of Colorado:

    • Maintain social distancing of 6 feet.

    • Face coverings required until runner crosses the start line. Face masks are to be put back on as you reach the finish line.

    • Runners must be “healthy” to attend, follow government guidelines for outdoor events.

    • No groups of over 25 at any time.

    • Runners are to bring their own pre-race and post-race hydration / nutrition.

    • All waste is to be place in a waste approved container.

Additional reference material:







After Your Run:

As a virtual run, participants will need to send a screenshot of their run tracked on Strava, MapMyRun or a similar app, to the Race Director to be recorded. Just click "Contact Race Director" at the top of this registration website.

You may also report times to Park Staff at the visitor center (open from 9am to 5pm). Final results will be uploaded to this website at the end of the month.  




All finishers will be rewarded with a "Friends of Castlewood Canyon" buff! Stop by the visitor's center with your run results and claim your swag.

Number of Participants: Limited to 300

Fastest Times:

While we do see some serious runners at this event, it is a fundraiser and all levels of ability are welcome. Participants walking along at a quick pace are just as appreciated as those trying to achieve a best time. Please join us in enjoying the trails at sunrise!


Our Sponsors


Friends of Castlewood Canyon

State Park

PO Box 403

Franktown, CO 80116



Castlewood Canyon State Park

2989 S. Highway 83

Franktown, CO 80116

T: (303) 688-5242


  • Grey Facebook Icon
  • Grey Twitter Icon
  • Grey G+ Icon
  • Grey YouTube Icon
  • Grey Pinterest Icon
  • Grey Instagram Icon

Website Designed & Created by Margaret O'Connor