The Trail del Bisaura is a 55 km mountain race with 3500 meters of positive elevation gain, held in Sant Quirze de Besora, Barcelona, Catalonia. The course traverses the Bisaura region, in the transition zone between Osona and Ripollès, offering a technical and demanding route. The event is notable for its authenticity and festive atmosphere, with trails that often present difficult conditions, including muddy sections. The start and finish are located in Sant Quirze de Besora, the starting and ending point for runners facing this challenge in the Catalan mountains.