Ultra-trail and trail running in the heart of the Ariège Pyrenees, from Guzet to Ax-les-Thermes
In just a few years, UltrAriège Pyrénées has become one of the most renowned trail running events in the Pyrenean massif. Organized every year in mid-July, this ultra-trail crosses the wildest and most spectacular landscapes of Haute-Ariège, from the resorts of Guzet and Monts d'Olmes to the spa town of Ax-les-Thermes, the common finish line for all races. Runners navigate between Pyrenean peaks, beech forests, summer pastures, and mountain villages, in a breathtaking setting.
UltrAriège offers 6 races over 5 distances, allowing every trail runner to find a challenge suited to their level:
UltrAriège operates on a semi-autonomous basis: runners must be self-sufficient between aid stations, carrying their own safety equipment (survival blanket, warm clothing, water and food supplies). Aid stations are located along the routes, staffed by volunteers who welcome runners with warmth and generosity. This organization reflects the spirit of the event: a human adventure as much as a sporting one, where solidarity between runners and volunteers is an integral part of the experience.
Based in Ax-les-Thermes, UltrAriège is a unifying event that mobilizes many municipalities in Haute-Ariège: Guzet, Aulus, Vicdessos, Mercus-Garrabet, the Monts d'Olmes, Ax-les-Thermes, and many other villages crossed by the runners. The event contributes to the sporting and tourist appeal of the department, attracting trail runners from all over France and abroad each year. Limited to 1,500 bibs, it maintains a friendly and mountainous spirit that makes it a popular event for trail enthusiasts.
UltrAriège Pyrénées returns from July 17 to 19, 2026 for a new edition in the heart of the Ariège Pyrenees. New for this edition: the ultra distance is reduced from 170 to 160 km (the section of the Ars waterfall after Guzet has been removed from the course), but it retains its 10,500 meters of positive elevation gain. The event is offered solo or as a 3-person relay. The other five distances — 100 km, 55 km, 23 km, and 15 km — allow every trail runner to find their challenge. Registration opens on November 30, 2025, on chrono-start.com, limited to 1,500 bibs.
Ax-les-Thermes, 09110, Ariège. Starts vary depending on the race (Guzet, Mercus, Monts d'Olmes, Ax-les-Thermes).
Opens on November 30, 2025, at 12 PM on chrono-start.com. Maximum 1,500 bibs.
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Ax-les-Thermes et Pyrénées ariégeoises
Place Roussel, 09110 Ax-les-Thermes