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Upcoming Triathlons in Colorado

Find 32 upcoming events across the state

DU Splash & Dash
Triathlon

DU Splash & Dash

Denver, CO
May 3, 2026
Aquathlon
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Springs Splash & Dash
Triathlon

Springs Splash & Dash

Colorado Springs, CO
May 9, 2026
Youth
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Colorado Triathlon
Triathlon

Colorado Triathlon

Boulder, CO
June 6, 2026
OlympicSprintAquabikeDuathlon
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The Valley Bottom Rio Trio
Triathlon
Price rises in 34 days

The Valley Bottom Rio Trio

Alamosa, CO
June 6, 2026
Dry Tri
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San Juan Trail Tri
Triathlon

San Juan Trail Tri

Ridgway, CO
June 13, 2026
Dry Tri
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IRONMAN 70.3 Boulder
Triathlon

IRONMAN 70.3 Boulder

Boulder, CO
June 13, 2026
Half Iron
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Summer Kickoff Kids Duathlon 2026
Triathlon

Summer Kickoff Kids Duathlon 2026

Colorado Springs, CO
June 14, 2026
Youth
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Lory Off-Road Triathlon
Triathlon

Lory Off-Road Triathlon

Bellvue, CO
June 20, 2026
OlympicDry Tri
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Loveland Lake to Lake Triathlon
Triathlon

Loveland Lake to Lake Triathlon

Loveland, CO
June 27, 2026
OlympicSprint
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The Sunlight Showdown
Triathlon
Price rises in 34 days

The Sunlight Showdown

Glenwood Springs, CO
June 27, 2026
Duathlon
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Boulder Sunrise Triathlon
Triathlon

Boulder Sunrise Triathlon

Boulder, CO
June 28, 2026
OlympicSprintDuathlon
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Sheep Creek Triathlon
Triathlon

Sheep Creek Triathlon

Antonito, CO
July 4, 2026
Sprint
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Pagosa Duathlon
Triathlon
Price rises in 34 days

Pagosa Duathlon

Pagosa Springs, CO
July 11, 2026
Duathlon
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Boulder Peak Triathlon
Triathlon

Boulder Peak Triathlon

Boulder, CO
July 12, 2026
OlympicDuathlonAquabike
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Rocky Mountain State Games - Swim / Run
Triathlon

Rocky Mountain State Games - Swim / Run

Colorado Springs, CO
July 12, 2026
Aquathlon
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Parker Parks and Recreation Kids' TRY-athlon
Triathlon
Price rises in 67 days

Parker Parks and Recreation Kids' TRY-athlon

Parker, CO
July 18, 2026
Youth
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Tri Boulder Sprint and Olympic Triathlon
Triathlon

Tri Boulder Sprint and Olympic Triathlon

Boulder, CO
July 18, 2026
OlympicSprintAquabikeDuathlon
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Steamboat Lake Sprint Triathlon
Triathlon

Steamboat Lake Sprint Triathlon

Steamboat Lake, CO
July 26, 2026
SprintAquabikeDry Tri
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CCOC Kids Triathlon
Triathlon

CCOC Kids Triathlon

Colorado Springs, CO
July 29, 2026
Youth
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Stagecoach Gravel Triathlon
Triathlon

Stagecoach Gravel Triathlon

Steamboat Springs, CO
August 2, 2026
SprintAquabikeDry TriDuathlon
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HRCA Splash Mash Dash Kids Triathlon
Triathlon
Price rises in 59 days

HRCA Splash Mash Dash Kids Triathlon

Littleton, CO
August 8, 2026
Youth
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Rocky Mountain Tri Fest
Triathlon

Rocky Mountain Tri Fest

Boulder, CO
August 9, 2026
SprintSuper SprintYouth
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Outdoor Divas Sprint Triathlon
Triathlon

Outdoor Divas Sprint Triathlon

Longmont, CO
August 16, 2026
Sprint
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Gunnison Valley Triathlon
Triathlon
Price rises in 95 days

Gunnison Valley Triathlon

Gunnison, CO
August 22, 2026
Sprint
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Boulder Sunset Triathlon
Triathlon

Boulder Sunset Triathlon

Boulder, CO
August 29, 2026
OlympicSprintDuathlonAquabike
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Littlefoot Triathlon
Triathlon

Littlefoot Triathlon

Morrison, CO
September 12, 2026
Sprint
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Harvest Moon Triathlon
Triathlon

Harvest Moon Triathlon

Boulder, CO
September 12, 2026
Half IronDuathlonAquabike
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Lake Nighthorse Triathlon - Sprint and Olympic
Triathlon
Price rises in 2 days

Lake Nighthorse Triathlon - Sprint and Olympic

Durango, CO
September 12, 2026
OlympicSprint
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Oktoberfest Sprint Triathlon
Triathlon

Oktoberfest Sprint Triathlon

Longmont, CO
September 20, 2026
SprintDry Tri
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Black Canyon Triathlon
Triathlon
Price rises in 137 days

Black Canyon Triathlon

Montrose, CO
September 26, 2026
SprintYouth
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Desert's Edge Triathlon Series
Triathlon

Desert's Edge Triathlon Series

Loma, CO
September 27, 2026
OlympicSprint
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Splashland Triathlon
Triathlon
Price rises in 138 days

Splashland Triathlon

Alamosa, CO
October 3, 2026
Sprint
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Finding the Right Colorado Triathlon

Whether you are looking for a beginner-friendly Sprint in Colorado or a challenging 70.3, Let's Race provides the most up-to-date calendar for triathletes. Our Colorado list is updated daily to include Ironman, Olympic, and local club races.