OTSO Ultra Trail Serra de Montsant

The OTSO Ultra Trail Serra Montsant-Costa Daurada celebrates its 17th edition on 10 and 11 October 2026 in Ulldemolins, within the Natural Park of the Serra de Montsant. The event offers mountain routes in semi-autonomy through a setting of great natural value and eremitic tradition, with distances ranging from the 63 km ultra to shorter routes and a stage race of 88 km. Several formats score for ITRA and UTMB Index. The event includes refreshment stations along the course, a runner’s bag, technical T-shirt, timing, live tracking, medical assistance, physiotherapy at the finish, showers and entertainment. It also offers a non-competitive Trek format of 11 km and a Start Trail 7K introductory event, with family and children’s participation accompanied by adults.