USA Triathlon is the governing body for triathlon, duathlon, and other multisport events, supporting 300,000+ members.

Your Hub for Endurance Sports

Everything you need to achieve your triathlon goals, from training plans and gear reviews to advice from the world's top triathlon experts.

the official triathlon resource. triathlon event information, news, results, rankings, rules, education, and more from world triathlon.

active powers the world’s events and activities and connects people with the things they love to do. find, register, or learn about races, local events, sports, and things to do near you. what’s your active?

IRONMAN offers world-class triathlon events, training resources, and race details. Start your journey to becoming an IRONMAN athlete today!

Join over 10000 successful athletes with a premium training plan from recognised expert Phil Mosley for ironman, triathlon, duathlon, running & cycling events.

Looking for up to date USA Triathlon results? Visit trifind for all the latest results from triathlon events 2025 in the USA, triathlon relay events, an updated triathlon calendar and more. Trifind USA Triathlon relay events calendar 2025.

Achieve your goals with the best in endurance training plus strength and conditioning, all in one place. Sign up free.

Train smarter with TriDot's AI-powered triathlon platform. Trusted by beginners & experienced athletes for personalized, data-driven training plans. Better results with less training and fewer injuries. Trust Your Training. Love Your Results.