Ultra-triathlon body of Ultra Triathlon. Ultra-triathlon An ultra-triathlon is a long-distance triathlon. The term generally refers to all triathlon events of distance greater than the Ironman Triathlon. Thus, every ultra triathlon event must involve more than of swimming, of cycling, and a full marathon () of running. The most common distances are the double, triple, quadruple, quintuple and deca triathlon. Unlike a standard triathlon event, an ultra-triathlon event may not necessarily involve the three component disciplines of triathlon (swimming, cycling and running) in direct consecutive order, but may instead consist of multiple consecutive individual triathlons performed on consecutive days. The IUTA
Swimming at the 2008 Summer Olympics – Men's marathon 10 kilometre for obstructing his fellow swimmers and a red card for misconduct. The men's 10 km races at the 2008 Olympics featured a field of twenty-five swimmers: Unlike all of the other swimming events in the pool, the men's and women's marathon 10 kilometre races were held in open water. No preliminary heats were held, with only the single mass-start race being contested. This race is held using freestyle swimming, with a lack of stroke regulations. For most of the event swimmers use the front crawl, but modifications are used situationally, especially when swimmers reach feeding stations. Open water swimming events