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
2012 Olympic Marathon Course 2012 Olympic Marathon Course The 2012 Olympic Marathon Course is that of both the men's and women's marathon races at the 2012 Olympic and Paralympic Games in London. The route consists of one short circuit of followed by three circuits of . The course, which was designed to pass many of London's well-known landmarks, starts and finishes on The Mall, within sight of Buckingham Palace, and extends as far as the Tower of London in the east and the Victoria Memorial in the west. The route of the marathon had been changed, for various logistical reasons, from that originally envisaged