A sport that includes running and hiking over trails. It's different from road running and track running because it involves hiking trails, often in mountainous terrain, where there can be much larger ascends and descends, however, it is difficult to definitively distinguish trail running from cross country running. In general, however, cross country is an IAAF governed discipline that is typically raced over shorter distances (rarely over 12 kilometers), whereas trail running is loosely governed, and run over longer routes.
