All indoor training? Honolulu-based Navy couple Judy and John Collins proposed combining the three toughest endurance races in Hawai’i—the 2.4-mile Waikiki Roughwater Swim, 112 miles of the Around-O’ahu bike race and the 26.2-mile Honolulu Marathon—into one event. The ultimate source for world class IRONMAN Coaching Certification and in-depth triathlete education. The small-town hospitality of Cambridge rallies around IRONMAN Maryland to share in athlete’s excitement. RULES Here you'll find the Official Competition Rules governing all IRONMAN and IRONMAN 70.3 events.
Ironman triathlons are a huge test of mental and physical endurance, and require serious training and commitment. The Ironman: 2.4 mile swim, 112 mile bike, 26.2 mile run. The comradery at IRONMAN Maryland is unlike anywhere else. On February 18, 1978, 15 people came to Waikiki to take on the IRONMAN challenge. Learn more. View Schedule + Past Races .