Colorado Multisport Calendar

   

Boulder Rez Marathon

Boulder Reservoir 5275 Reservoir Road, Boulder, CO

This amazing run course will take you alongside the Boulder Reservoir, remaining mostly on dirt roads and trails. The course is flat with only 200 feet of gain, and will provide views of the Boulder Reservoir and Rocky Mountains. Marathon, 3/4 Marathon, Half Marathon, 10K, Relay

Boulder Sunset Triathlon

Boulder Reservoir 5275 Reservoir Road, Boulder, CO

Join us for an unforgettable morning at the Boulder Reservoir. Although this race does not take place at sunset, it will take place at the end of the summer-- it's sister race is the Boulder Sunrise in June. Experience gorgeous views at the recently upgraded venue. All participants receive stellar race shirts and finisher medals, […]

Harvest Moon Long Course Triathlon

Boulder Reservoir 5275 Reservoir Road, Boulder, CO

The Harvest Moon Triathlon the 23rd edition of this event takes place at the beautiful Boulder Reservoir on September 10th, 2022. Est. in 2000 this Colorado classic provides the veterans to beginners a challenging, affordable, and competitive race with a local flavor. Whether this is your final event of the season, or a tune-up for […]

IRONMAN 70.3 Boulder

Boulder Reservoir 5275 Reservoir Road, Boulder, CO

Presale Registration for 2023 IRONMAN 70.3 Boulder opens at 10am MT on Thursday, August 4, 2022.

Without Limits Productions

   

BlueSeventy Wetsuits

   

Longmont Try a Tri Harvest Moon Triathlon Oktoberfest Triathlon