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
Quarter marathon Quarter marathon Quarter marathon (QM) refers to either an exact race of a quarter of a marathon, or running for 10–15 kilometers (approx. 6.5–9 miles) without a rest. The former is held in many places around the world. Sisaket, a north-eastern province in Thailand, holds quarter marathons on the third Sunday of December every year. Bushey, a town in East England also holds quarter marathons every July. The Congleton Quarter Marathon was set up by the Congleton Lions; it afforded participants the opportunity to run alongside the half marathon runners. The Congleton Lions decided to stop organising the race in