Initially, Skyrunning e Skyrunner® defined the activity in each participants competed in races above 2000 meter above seal leve. Having in mind that not all countries possess these mountain regions with such heights, the ISF did not want to discard regions and counties that had excellent mountain races. For these reasons it has widened also to events that are under 2000 meters seal level but also possess a extremely high elevation in in the shortest distance possible.