The Boca del Infierno long course covers 25 km of mountain terrain in Selva de Oza, located in the Valle de Hecho, Huesca, Spain. This is the longer of the event’s two options, the other being 15 km. The long race includes approximately 1,500 metres of elevation gain. Both main races begin in Selva de Oza, with the long course starting in the morning, followed by the shorter course.
Club de Montaña Asamun is the organizer of this event, which has a long history on the Aragonese and Spanish mountain-running calendars. The weekend also features cadet and children’s races. The children’s events take place in Plaza San Miguel in Hecho. Bib collection is available the evening before or on race morning at the finish area. Following the children’s races, there are trophy presentations and a snack, contributing to the event’s atmosphere as a local club race.