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 Olympic Association that the 1908 Olympics would include a marathon of about 25 miles or 40 kilometres. The British Olympic Council handed responsibility for organising the Marathon to the Amateur Athletic Association, but they had no experience at organising a road race of such a length. In late 1907, an offer was made by Jack Andrew honorary secretary of the Polytechnic Harriers to take over the task. This was accepted in February 1908, though already, in November 1907, a route of "about 25 to 26 miles in distance" had been published in the newspapers, starting at Windsor Castle and finishing