Long-distance running only the placing is of importance. Other less popular variants such as fell running, trail running, mountain running and tower running combine the challenge of distance with a significant incline or change of elevation as part of the course. Multisport races frequently include endurance running. Triathlon, as defined by the International Triathlon Union, may feature running sections ranging from five kilometres (3.1 mi) to the marathon distance (42.195 kilometres, or 26 miles and 385 yards), depending on the race type. The related sport of duathlon is a combination of cycling and distance running. Previous versions of the modern pentathlon incorporated
Sanyo Women's Half Marathon Sanyo Women's Half Marathon The Sanyo Women's Half Marathon, also known as the Sanyo Women's Road Race (), is an annual road running competition for women held in December in Okayama, Japan. It features both a 10K run and half marathon race (21.1 km/13.1 miles). Sanyo Shimbun, a daily newspaper, is the title sponsor for the event. The day's events previously included an inter-prefectural competition (1985 to 1999) and a junior 3 km race in the 1990s. The half marathon race attracts top level Japanese and Japan-based foreign runners, as well as a smaller number of other international runners. The