The Travesía de Resistencia Sierra de Grazalema is a 60 km mountain march held in Prado del Rey, Cádiz, typically in October. It is a non-competitive endurance event, emphasizing completion of a long day on foot over racing for position. The schedule highlights the event's demands: participants begin at 4:00 AM, with the event concluding by 19:30.
Club de Montaña Tritón organizes the march under the FADMES federation. Registration is tiered, prioritizing clubs and organizers, followed by federated participants, and then non-federated walkers if space allows. The reception takes place in the town hall meeting room in Prado del Rey, contributing to the event's local, club-organized character rather than a commercial race atmosphere.