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Whether a race, special group ride, training opportunity, or cycling-related community event, the 303 calendar showcases it all.  To have an event posted here please follow this link:  Event Policy Submission & Guidelines.

Steamboat Sprint & Olympic Triathlon – SOLD OUT

Lake Catamount Steamboat Springs

Steamboat Springs   Sprint Distance Triathlon, Olympic Distance Triathlon, Olympic Distance Aquabike, & NEW Olympic Distance Duathlon ​ The Steamboat Triathlon features a sprint distance, olympic distance, and aquabike.  TheRead More

Boulder Sunset Triathlon

Boulder Reservoir Boulder

Boulder Summer may be coming to an end, but our tri season is still heating up! Join us at the Boulder Reservoir for the 12th annual Boulder Sunset Triathlon, aRead More

Harvest Moon Long Course

Boulder Reservoir Boulder

Boulder   The Harvest Moon Triathlon the 19th edition of this event takes place at the beautiful Boulder Reservoir. on September 16th, 2018.  Est. in 2000 this Colorado classic  provides theRead More

ColoradoTriathlon

Boulder Reservoir Boulder

Boulder Reservoir   ALREADY 42% SOLD OUT AS OF 12/28/2018! Who's ready to kick off the 2019 season?! The Colorado Triathlon is where Colorado comes to race on June 1st,Read More

Lake to Lake Triathlon

Loveland High School 920 W 29th St, Loveland

Loveland   The Loveland Lake to Lake Triathlon provides triathlon enthusiasts with a safe and enjoyable event in which to compete, regardless of their competitive level. It promotes the triathlonRead More

Boulder Sunrise Triathlon

Boulder Reservoir Boulder

Boulder   Kick off your summer at the Boulder Sunrise Triathlon! Boulder, CO is a triathlete’s paradise! With many pro athletes and Tri clubs attending, you’ll experience the best racingRead More

Tri Boulder

Boulder Reservoir Boulder

Boulder   ‘The Beast’ Long Course distance will be back for its second year! As one of Colorado’s most popular summer triathlons, Tri Boulder offers many different multisport race distances,Read More

Steamboat Triathlons

Lake Catamount Steamboat Springs

Steamboat Springs   Sprint Distance Triathlon, Olympic Distance Triathlon, Olympic Distance Aquabike, Olympic Distance Duathlon, & NEW Stand-Up Paddle-Board Options The Steamboat Triathlon features a sprint distance, olympic distance, aquabike,Read More

Boyd Lake Bash Multisport Festival

Boyd Lake Loveland

Loveland   Escape to the lake! The “Boyd Lake Bash” Multisport Festival will be an event you’ll look forward to all season long. Why? Beautiful mountain views, ideal weather andRead More

Harvest Moon Long Course

Boulder Reservoir Boulder

Boulder   The Harvest Moon Triathlon the 20th edition of this event takes place at the beautiful Boulder Reservoir on September 15th, 2019. Est. in 2000 this Colorado classic providesRead More