Kilian Jornet has confirmed he will return to the Zegama-Aizkorri marathon on 17 May for the race's 25th anniversary edition, adding another marquee event to what is shaping up to be the most ambitious competitive season of the Catalan trail running legend's career. The 38-year-old, who has won Zegama a record 11 times, will use the Basque Country classic as the opening act in a summer programme that also includes the Western States 100 on 27 June, Sierre-Zinal on 8 August, and a bid for a record fifth UTMB title on 28 August.
Zegama-Aizkorri holds a special place in Jornet's career. The 42-kilometre race through the Basque mountains, with its 2,736 metres of elevation gain over often technical and muddy terrain, was where Jornet first announced himself as a force in senior trail running. His 11 victories at the race span more than a decade, and his return for the 25th anniversary will generate enormous excitement in a sport that has grown exponentially since his first win there. The race regularly attracts thousands of spectators to the Aizkorri mountain range, and Jornet's presence is expected to make this year's edition one of the most watched trail races of the spring.
The broader significance of Jornet's 2026 schedule lies in its sheer scope. Racing four major events in the space of 14 weeks — from a steep, technical 42k mountain race to a 100-mile point-to-point endurance test in the Californian heat, followed by a short, fierce Alpine climb and then the 171-kilometre circumnavigation of Mont Blanc — would be a formidable programme for any trail runner. For Jornet, who has historically been selective about his race calendar and meticulous about peaking for specific targets, the density of the 2026 programme represents something genuinely new.
The centrepiece of Jornet's summer will be the UTMB on 28 August at Chamonix. His return to the race he last entered in 2022, when he set the current course record of 19 hours 49 minutes 30 seconds, has been one of the most anticipated storylines in trail running. A victory would give him a record fifth UTMB title, moving him clear of François D'Haene as the most successful male runner in the event's history. The question is whether Jornet can arrive at Chamonix in peak condition after the physical demands of Western States and Sierre-Zinal in the preceding weeks, or whether the accumulated fatigue will blunt his edge against fresher rivals.
Jornet's willingness to take on such a packed calendar at 38 speaks to both his enduring physical gifts and his evolving relationship with competition. As the co-founder of NNormal, his trail running shoe and apparel brand, and as one of the sport's most influential voices on issues ranging from sustainability to UTMB's commercial direction, Jornet occupies a unique position in the trail running world. His 2026 season will be a test of whether the greatest mountain runner of all time can compete at the highest level across multiple disciplines and distances in a single summer — a challenge that has no real precedent in the sport's history.