Colorado Multisport Calendar

Frisco Triathlon

Frisco Bay Marina 267 Marina Road, Frisco, CO, United States

Are you looking for a new challenge this summer? Register for the 8th Annual Frisco Triathlon featuring stand-up-paddle boarding, mountain biking, and trail running. This twist on a triathlon is open to all ability levels and encourages athletes to take on a new multi-sport event. The Frisco Triathlon was named “Best Triathlon” in Elevation Outdoors […]

Boulder Rez Marathon

Boulder Reservoir 5275 Reservoir Road, Boulder, CO, United States

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

Timberview Trail Run

Lory State Park (Fort Collins) 708 Lodgepole Drive, Bellvue, CO, United States

Crisp morning air and a summer sunrise in Colorado. YES PLEASE! Join us on the foothills at Lory State Park for a fun & beautiful morning trail race. This run race features three distances (a 10 mile, a 5 mile and a 5K) that are great for just about any level athlete at any age. […]

Run the Rockies Trail 10K & Half Marathon

Frisco Nordic Center 616 Recreation Way, Frisco, CO, United States

The Run the Rockies Trail 10k and Half Marathon will lead runners through the Frisco Peninsula trails with breathtaking views of Lake Dillon and the Ten Mile Range. This is a great course for a first time half-marathoner or runner looking for a fun course that offers single track and dirt road trails. Racers will […]

XTERRA Lake Tahoe

Lake Tahoe, California Lake Tahoe, CA, United States

An all-time classic off-road triathlon course! Triathletes will start from a new location at Sand Harbor State Park in Lake Tahoe, one of the purest and deepest lakes in North America. Trail Runs take place on the same day with the course starting and finishing at the Village Green in Incline Village, NV. 26 World […]

Boulder Sunset Triathlon

Boulder Reservoir 5275 Reservoir Road, Boulder, CO, United States

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, […]

XTERRA Tremblant

Domain St-Bernard, Quebec, Canada Domain St-Bernard, Quebec, Canada

Welcome to XTERRA Tremblant. This will be year three of this amazing off-road event in the heart of Quebec's triathlon mecca. The venue is a unique ecological preserve that is transformed for one weekend only every year into an off-road triathlon getaway.

Run the Rockies Road 10K & Half Marathon

Frisco Frisco, CO, United States

The Run the Rockies Road 10k and Half Marathon will feature the traditional Run the Rockies Road Race course with runners starting near Copper Mountain; runners will follow the paved recreation path through the Ten Mile Canyon. The 10k course is 100% downhill and the half marathon course is 75% downhill. This course will showcase […]

Pikes Peak Ascent

Manitou Springs Manitou Springs, CO, United States

The Pikes Peak Marathon, founded in 1956, is the oldest continually held marathon in the United States, taking runners from Manitou Springs, Colorado, to the summit of Pikes Peak at 14,115 feet, and back down for a total of 26.2 grueling mountain miles. It and its sister race, the Pikes Peak Ascent, each climb about […]

Pikes Peak Marathon

Manitou Springs Manitou Springs, CO, United States

The Pikes Peak Marathon, founded in 1956, is the oldest continually held marathon in the United States, taking runners from Manitou Springs, Colorado, to the summit of Pikes Peak at 14,115 feet, and back down for a total of 26.2 grueling mountain miles. It and its sister race, the Pikes Peak Ascent, each climb about […]

XTERRA Laguna Beach

Crystal Cove State Park, California Crystal Cove State Park, CA, United States

The XTERRA Laguna Beach Triathlon is an epic off-road experience featuring stunning views of the Pacific. Participate in the short or long course triathlon, ocean swim, aquathlon or trail run. Post-race, join us for a cold brew at the Beer Garden. This event sold out last year, so register early to secure your spot!

Narrowleaf Lake Run

Boyd Lake State Park (Loveland) 3720 N County Road 11-C, Loveland, CO, United States

Brisk autumn running in Colorado – OH YEA! Join us for a family fun event with three distance options at the beautiful Boyd Lake State Park venue. What’s a “Narrowleaf” you ask? The Narrowleaf Cottonwood Trees are the most densely populated tree species at Boyd Lake State park. We thought the name was fitting and […]

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