Boulder Rez Half
This spring race features a spectator-friendly Half Marathon, 10K and 5K course. Attracting athletes from all over the west due to its phenomenal scenery, glamorous finisher medals, perfect running temperatures […]
Events
12 events found.
Colorado Multisport Calendar
Sprint Distance
Events
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Boulder Reservoir 5275 Reservoir Road, Boulder, CO, United States
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Harvest Moon Long Course Triathlon
Boulder Reservoir 5275 Reservoir Road, Boulder, CO, United StatesThe Harvest Moon Half Distance Triathlon: This event takes place at the beautiful Boulder Reservoir on May 31st, 2026 and we couldn't be more excited to be back for another […]
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Loveland Lake to Lake Triathlon
North Lake Park (Loveland) 2750 N. Taft Ave., Loveland, CO, United StatesThis event provides a beautiful venue. The transition area and lake are near North Lake Park. North Lake Park is a nice setting for competitors and families. It has a […]
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Boulder Sunrise Triathlon
Boulder Reservoir 5275 Reservoir Road, Boulder, CO, United StatesKick off your summer of racing in Boulder.
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LG Triathlon
Gypsum Gypsum, CO, United StatesJoin us for the Annual LG Tri, a sprint triathlon in the beautiful Vail Valley town of Gypsum, Colorado. The course features a 500-yard open water swim, a 12-mile bike […]
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Tri Boulder
Boulder Reservoir 5275 Reservoir Road, Boulder, CO, United StatesAs one of Colorado’s most popular summer triathlons, Tri Boulder offers many different multisport race distances, all in one eventful day! Join us for a full day of racing at […]
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Steamboat Lake Triathlon
Steamboat Lake State Park 61105 County Road 129, Clark, CO, United StatesAfter last summer this event instantly became a personal favorite for our staff, volunteers, and athletes - come find out why! We couldn't be more excited about this course, this […]
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Stagecoach Gravel Triathlon
Stagecoach Reservoir (Steamboat Springs) 25500 County Road 14, Oak Creek, CO, United StatesWe didn't get the chance to launch this race in 2020, but that didn't diminish our passion for this brand new style of triathlon! To say this race is “unique” […]
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Tri Boulder
Boulder Reservoir 5275 Reservoir Road, Boulder, CO, United StatesRocky Mountain Tri-Fest was established in 2023 to cater to the whole family. With events for everyone from mom and dad looking to try their hand at a gravel triathlon, […]
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Outdoor Divas Sprint Triathlon
Union Reservoir (Longmont) 461 County Road 26, United StatesThe Outdoor Divas Sprint Triathlon features a half mile lake swim, a flat and fast single loop 12.4 mile bike, and finishes with a 3.1 mile run on a gravel […]
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Boulder Sunset Triathlon
Boulder Reservoir 5275 Reservoir Road, Boulder, CO, United StatesJoin 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 […]
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Littlefoot Triathlon
Bear Creek Lake Park (Lakewood) 15600 W. Morrison Road, Lakewood, CO, United StatesEnjoy a fun late season tri at beautiful Bear Creek Lake Park in the Lakewood/Morrison area. Set at the base of the foothills, the Littlefoot Triathlon starts off with a […]
