« All Events This event has passed. Tri the Rock Annual Youth Triathlon September 12, 2021 @ 7:30 am - 12:00 pm « Summer Concert Series – Super Diamond with The Denver Pops Festival Park Farmers Market » Add to calendar Google Calendar iCalendar Outlook 365 Outlook Live Details Date: September 12, 2021 Time: 7:30 am - 12:00 pm Event Tags:youth triathlon Website: www.crgov.com/tritherock Venue Butterfield Park 3952 Butterfield Crossing Dr Castle Rock, CO 80109 + Google Map View Venue Website