Triathlons in Colorado
Colorado has 18 upcoming triathlons scheduled for 2026. No single city dominates the calendar. Loveland leads with 3 races, followed by Boulder (3), Ridgway (1), and Bellvue (1). The remaining 56% of the calendar is spread across smaller cities.
Showing all 18
Triathlon
2026 Xterra Lory Off Road Triathlon
Bellvue, CO
Triathlon
2026 Xterra Lory Off Road Triathlon
June 20, 2026
Bellvue, CO
Triathlon
2026 Loveland Lake to Lake Triathlon
Loveland, CO
Triathlon
2026 Loveland Lake to Lake Triathlon
June 20, 2026
Loveland, CO
Triathlon
Lake to Lake Triathlon
Loveland, CO
Triathlon
Lake to Lake Triathlon
June 27, 2026
Loveland, CO
Triathlon
2026 Boulder Sunrise Triathlon
Boulder, CO
Triathlon
2026 Boulder Sunrise Triathlon
June 28, 2026
Boulder, CO
Triathlon
Boulder Sunrise Triathlon
Boulder, CO
Triathlon
Boulder Sunrise Triathlon
July 4, 2026
Boulder, CO
Triathlon
Frisco Triathlon - Friday
Frisco, CO
Triathlon
Frisco Triathlon - Friday
July 11, 2026
Frisco, CO
Triathlon
CCOC Kids Triathlon
Colorado Springs, CO
Triathlon
CCOC Kids Triathlon
July 29, 2026
Colorado Springs, CO
Triathlon
Boulder Kids' Tri Camp
Boulder, CO
Triathlon
Boulder Kids' Tri Camp
August 3, 2026
Boulder, CO
Frequently asked questions
What are the standard triathlon distances?▾
The main distances are Sprint (750m swim, 20K bike, 5K run), Olympic (1.5K swim, 40K bike, 10K run), Half-Ironman/70.3 (1.2mi swim, 56mi bike, 13.1mi run), and full Ironman (2.4mi swim, 112mi bike, 26.2mi run). Browse all distances on RACE.
What do I need for my first triathlon?▾
At minimum you need a swimsuit, goggles, a road or tri bike, helmet, running shoes, and a race belt for your number. Many beginners start with a sprint triathlon, which can be completed in 1-2 hours.
What is the difference between sprint and Olympic triathlon?▾
A sprint triathlon is roughly half the distance of an Olympic triathlon. Sprints typically take 1-1.5 hours while Olympic distance races take 2-3.5 hours. Sprints are ideal for beginners.
How do I qualify for the IRONMAN World Championship?▾
Athletes qualify by earning a slot at an IRONMAN-branded qualifying race. Each full IRONMAN event allocates slots to age group winners. The World Championship is held annually in Kailua-Kona, Hawaii.
What are the biggest triathlons in the US?▾
The SuperTri Chicago Triathlon is the largest single triathlon event with 8,000+ athletes. IRONMAN events in Texas, Florida, Lake Placid, and Arizona draw thousands. Escape From Alcatraz is a bucket-list race. Find them all on RACE.