Ultra Trail Sierra de Cazorla is a 65 km trail race held in October in the Sierra de Cazorla, Segura y Las Villas Natural Park, Jaén Province, Andalusia, southern Spain. The course gains 3,700 m (56.9 m/km) — elevation density matching UTMB — across limestone ridges, pine forest, and the headwaters of the Guadalquivir River. At 14.9% average uphill gradient and just 12.6% flat terrain, it is one of the steepest 65km courses in Europe.
The course gives no warmup: a 780m climb begins at km 0.48 and runs 7.7 km at 10.2% average. The final 14km feature two consecutive major descents totalling 1,455m on gradients averaging −10% to −13%. The route passes through Collado Zamora, the Nacimiento del Guadalquivir (source of the Guadalquivir River), and the Cueva Jaén descent, with scramble-grade pitches on multiple sections. Entry costs €1.15/km. Nearest airports are Granada (GRX) at 1.5–2.5 hours and Málaga (AGP) at 3 hours.
Held annually since around 2016 (65km format from 2023), the race draws around 118 finishers. It is a UTMB 100K qualifier (3 ITRA points) and a Copa de Andalucía de Ultras qualifier. It suits experienced technical trail runners who want a seriously steep, remote Andalusian race with almost no recovery terrain.