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 distances relative to the lap start point of various prominent landmarks passed on the route are shown in the table below: When London submitted its bid for the Olympic Games in 2004, the bid chairman Sebastian Coe said: "The marathon course has been designed to include as many of the city's landmarks as possible". Although the final route is different from the one proposed in the bid, it still passes many notable landmarks. Originally the route was planned to start at Tower Bridge, run through Tower Hamlets and finish at the Olympic Stadium. It would have had a 580 m