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
Sundown Marathon Sundown Marathon The Sundown Marathon, previously known as Adidas Sundown Marathon, is an annual Sports Tourism event that started in 2008. The race takes place in Singapore. The marathon is organized by the same team that made the Aviva Ironman 70.3 Singapore Triathlon possible. It attracts a diverse group of athletes and managed to attract 10,670 entrants in 2009. There are different races and they are namely the ultramarathon (84.39 km), the marathon (42.195 km), the Women (10 km) and the Team/Corporate Challenge (10 km x 4 runners). The races all fall on the same night with different start times.