Val d'Aran by BUFF

Val d'Aran by BUFF is one of Spain's most demanding mountain bike events, set in the stunning Val d'Aran in the heart of the Pyrénées. The 100 km marathon route accumulates a punishing 3,600 m of climbing through alpine meadows, dense forests and technical mountain trails at altitudes exceeding 2,000 m. The Pyrenean terrain is unforgiving: expect steep, rocky climbs that require solid bike handling, technical descents on loose surfaces, and long stretches at altitude where the thin air amplifies every effort. Unlike road events, the technical sections mean you cannot simply focus on fitness — bike skills are equally important for both safety and speed. Training should combine endurance building with technical skill development. Include long MTB rides with significant climbing to build mountain-specific fitness, and dedicate sessions to practicing technical climbs and descents. Strength work for upper body and core will help you stay controlled on rough terrain for hours. If possible, train at altitude to prepare for the reduced oxygen levels of the high Pyrenean passes.