Colorado
Colorado Triathlon Calendar 2026-2027
Monthly updates for Colorado
Get new running races (and updates) in your inbox every month.
Explore the best triathlons in Colorado for 2026-2027! Our updated list features 10 exciting races across the region. Find your next race in Colorado below and join the running community at these great events!
February 2026
Tackle crisp trails at the Chilly Cheeks Duathlon on Feb 21 2026 at Cherry Creek State Park. This Run Bike Run features short runs and a scenic bike loop on mixed terrain and welcomes fat tire bikes and relays for competition and awards.
April 2026
Challenge yourself on April 18, 2026 in Durango with the Sky Rim Duathlon at Fort Lewis College. Enjoy a scenic 3 mile run, 12.5 mile bike, then another 3 mile run through campus and along Rim Drive.
May 2026
A community walk, run and bike event in Colorado Springs on May 2, 2026 that raises funds for pediatric brain cancer research through Children's Hospital Colorado Foundation.
June 2026
Join the Loveland Lake to Lake Triathlon on June 27 in Loveland, Colorado, offering Sprint and Olympic distances plus Aqua Bike, SUP and relay options. Enjoy a USAT sanctioned, family friendly venue with shaded spectator areas and age group awards.
September 2026
Challenge yourself at the Lake Nighthorse Triathlon in Durango Colorado on September 12 2026. Sprint and Olympic distances plus sprint relay options, USAT sanctioned. High elevation open water swim, hilly bike and scenic dirt run.
Valkyrie Multisport Relay in Durango on Sept 19, 2026 invites teams and solo racers to take on seven stages blending trail run, mountain and road biking, paddleboard, swim, river paddle and road run. Choose full or sprint courses or tackle the Ultra..
Durango's Valkyrie Relay is a scenic multisport team or solo challenge across trails, roads, lakes and the Animas River with full and sprint courses. Teams up to nine or solo Ultra Heptathletes combine running, biking, SUP and paddling.
Join the 24th Annual Black Canyon Triathlon in Montrose for a family friendly fundraiser supporting the local community. Heated pool swims, paved bike and run courses and divisions for all ages and abilities.
October 2026
ÖTILLÖ Colorado USA is a swimrun near Fort Collins that mixes reservoir swims and park trail runs across three distances. The event offers team and solo categories, mandatory safety gear, and day-before packet pickup in Fort Collins.