Skyrunning is a discipline in the sport of mountain running that involves running at high altitudes on technical, steep and rocky terrain. Synonyms for skyrunning include high altitude running, mountain running, alpine running, mountain racing, vertical running, alpine racing, and vertical kilometer racing. The sport demands physical and mental strength, as well as technical skills for navigating challenging mountain terrain. Skyrunning races take place all over the world, from the highest peaks in the Alps to the mountain ranges in the Andes and Himalayas. Athletes who participate in skyrunning events continue to push the boundaries of the sport, making it one of the most exciting and challenging disciplines in mountain sports.