Guide to Intense Ironman Triathlons

Athletes travel the world to swim, bike and run in the biggest Ironman triathlons around the world, including Ironman World Championship in Kona, HI. Get the scoop on a few Ironman race courses.

The Ironman World Championship is the ultimate test of mind, body and spirit. Only the best triathletes converge on Kailua-Kona, HI, to embark on this 146.6-mile journey. Officially, there are 63 half-Ironman triathlons and 31 full-Ironman triathlons held around the world -- the biggest competitions are the Ironman World Championship, Ironman European Champion, Ironman US Championship and Ironman Asia-Pacific Championship.