There is running in the hills and mountains – and then there's skyrunning. The discipline of skyrunning specifically takes place in technical mountain terrain above an altitude of 2,000 meters, with steep ascents and descents.
And there are even more specifics to skyrunning – to be classified as a skyrunning race by governing body the International Skyrunning Federation (ISF), event courses must have a 6% minimum average incline over the total distance, and at least 5% of the total distance must have an incline of 30% or more. The climbing difficulty must not exceed II° grade UIAA, and the finishing time must be under 16 hours. Asphalt must be less than 15% of the total distance.
