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
Athletics at the 1908 Summer Olympics – Men's marathon Athletics at the 1908 Summer Olympics – Men's marathon The men's marathon race of the 1908 Summer Olympics took place in London on 24 July 1908. Johnny Hayes won after Dorando Pietri was disqualified for having received assistance before the finish line. For the first time in an Olympic marathon, the distance was , which would become the standard distance in 1921. 75 competitors entered the race, of whom 55 from 16 nations started, with 27 from 11 nations finishing. At a meeting of the International Olympic Committee in The Hague in May 1907 it was agreed with the British