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
Great Wall Marathon Great Wall Marathon The Great Wall Marathon is an annual marathon race, traditionally held on the third Saturday of May along and on the Huangyaguan or Huangya Pass (Chinese: 黄崖关; Chinese: 黃崖關; Pinyin: Huángyáguān； Literally: "Yellow Cliff Pass"), Tianjin section of the Great Wall of China East of Beijing. Since it first start in 1999, the race has grown to several hundred participants. A locally organized event offering a full selection of runs including a full marathon (42.2k), half marathon (21.1k), 10k, and 5k distances. Aside from the main marathon, a half marathon, 10 km and 5 km runs were