section_path: Events
section_name: Events
paragraph_text: Events
  
  World Athletics, the sport's governing body, defines athletics in six disciplines: track and field, road running, race walking, cross country running, mountain running, and trail running. Mountain running was added in 2003 and trail running was added in 2015.
  
  All forms of athletics are individual sports with the exception of relay races. However, athletes' performances are often tallied together by country at international championships, and, in the case of cross country and road races, finishing positions or times of the top athletes from a team may be combined to declare a team victor.
  
  Several further forms of competitive running exist outside of the governance of World Athletics. The International Skyrunning Federation (ISF) governs high-altitude mountain running, defined as skyrunning, and is affiliated with the International Climbing and Mountaineering Federation rather than World Athletics. Competitive stair climbing events, usually hosted in skyscrapers, has two common names: vertical running (as described by the ISF) and tower running (as described by the Towerrunning World Association). Snowshoe running is a winter sport governed by the World Snowshoe Federation, which is similarly to cross country running but has athletes wearing snowshoes to race over deep snow on an obstacle-free course. The International Association of Ultrarunners organises ultra running as an affiliate of World Athletics, but these long-distance forms of competition fit within World Athletics disciplines, albeit with additional distance.