Tri the Rock

It’s waiting for you ... all you have to do is try! Tri the Rock youth

Come for a day of fun, food prizes and sports. This annual youth triathlon is for young athletes ages five to 18. From kids who have never even heard of a triathlon to seasoned competitive triathletes, Tri the Rock encourages kids to get out and give it a try. 

Race information

Sunday, May 17, 2020

6 a.m. - bike racks open
7:30 a.m. - race begins

Butterfield Crossing Park and Pool, 3952 W. Butterfield Crossing Drive

Register for the 2020 Tri the Rock!

Free First Timer Clinic

New to the sport of triathlon and wondering how it all works? Check out our free informational clinic. Space is limited so don’t delay in registering. Can’t make the clinic? Check out this informational handout.

Date: Sunday, May 3
Time: 2-4:30 p.m.
Location: Butterfield Crossing Park


Youth Triathlon Expo

  1. This year, packet pick up will be even more exciting! Parents and youth triathletes are invited to learn more about the sport at the Youth Triathlon Expo.

    Visit with swim teams, triathlon clubs and sport-related vendors while picking up your Tri the Rock packet.

    Saturday, May 16, 2020
    noon - 2 p.m.
    Castle Rock Recreation Center

    Interested in having a vendor booth or table?

    This is a great opportunity to share details about your organization. More than 400 participants are expected to be picking up their packets that day. Interested in reserving a free booth?
    Email us for more information.

Age Divisions

Tri the Rock now competes based on the athlete’s age as of race day. Be sure to register accordingly.  A race for 15-18 year olds was added to this year’s line-up!

  1. 15-18 years old
  2. 11-12 and 13-14 years old
  3. 7-8 and 9-10 years old
  4. 5-6 years old

15-18 years old

New age group this year!

  • 100-meter swim (four pool lengths, down and back twice)
  • 16-kilometer bike ride
  • 3-mile run


Looking to help out?volunteerconnectlogo-sm

We couldn’t do it without you! Volunteer shift sign-up available at

Thanks to all of our 2019 triathletes!