Swim, Bike, Run. Repeat. There are roughly 4,500 Triathlons in the USA every year. Do you want to participate in one of them? These distances vary from Sprint (generally 1/2 mile swim, 12.4 mile bike, 3.1 mile run) to a full Ironman (2.4 mile swim, 112 mile bike, 26.2 mile run) and some distances in between such as the Olympic and the Half-Ironman. Depending on your desire for a specific distance, give the Search option a chance to generate possible races for you.