The Roller Masters Trail Ciudad de la Unión is a 25-kilometer mountain race with a positive elevation gain of 1500 meters, held in La Unión, Murcia. The course runs through the mountainous terrain characteristic of the Sierra Minera, offering a demanding and technical route ideal for experienced trail runners. The event is part of the CXM FMRM League, giving it a competitive nature and attracting athletes from the region. The organization provides aid stations along the course and chip timing to ensure accurate participant times. Access to the town and parking options are factors for runners traveling to participate in this sporting event.