Zegama, ESP ·
15 May - May 17, 2026
42 kilometers across the Basque peaks, where the roar of the crowd echoes through the Aizkorri massif.
Zegama Aizkorri is one of the most legendary mountain marathons in the world, a 42 kilometer course climbing more than 2,700 meters through the rugged peaks of the Basque Country. Held every May since 2002 in the small village of Zegama, it draws the planet's best skyrunners to a race revered as much for its brutal terrain as for the deafening passion of its fans.
Born in 2002 in the small Basque village of Zegama, this race is widely regarded as the most prestigious mountain marathon on the planet. The 42 kilometer course winds through the Aizkorri Aratz Natural Park in Gipuzkoa, climbing more than 2,700 meters across the highest summits of the Basque Country, including Aizkorri and Aitxuri, which both rise above 1,500 meters.
The terrain is unforgiving: steep grass slopes, slick limestone ridges, deep beech forests, and a notoriously fickle weather that can turn the trails into a sea of mud within minutes. Runners pass the medieval tunnel of San Adrián and the chapel of Sancti Spiritu, where thousands of fans gather to scream their lungs out at the leaders, in a scene often compared to the Tour de France.
Limited to around 500 runners drawn by lottery, the race has crowned the greatest names in trail running, from Kilian Jornet to Stian Angermund and Maude Mathys. A flagship stage of the Golden Trail World Series, it remains the ultimate proving ground for mountain runners and a vibrant celebration of Basque culture, hospitality, and the wild beauty of the Aizkorri massif.