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
Dublin Marathon levels have since increased significantly year-on-year with 19,500 completing the 2016 event. In 2001 the marathon became part of the Dublin Race Series, which includes pre-marathon events of 5 miles, 10 kilometres, 10 miles and half marathon distance over the preceding months, run in the Phoenix Park and Swords. A competitor died while running in the 2006 marathon and another in the 2013 marathon. The Dublin marathon is associated to a series of 4 other races in the calendar year. These races include, The Irish Runner 5 mile, The Frank Duffy 10 mile, Fingal 10k and the Dublin half Marathon.