The Andorra Ultra Trail series is a 170 kilometre (105 mile) running event that takes in 13,500 metres of climbing, more than 1.5 times the height of Everest, in just 2 days. Taking place in the Pyrenees the terrain is demanding, but the views are stunning, as runners ascend to the highest point in the principality, the summit of Comapedrosa. The non-stop race requires technical running skills and takes in some of the most unspoiled mountain areas in Europe, including the Sorteny Valley National Park and the Madriu Valley, an area with World Heritage Status. In between crossing 16 summits with a height of more than 2,400 metres the runners will be cheered on by the local community who turn out to support the event. With shorter courses also available, the event is a festival of trail running.