The Lakuntza-Aralar Mendi Lasterketa Luzea is a mountain race held in Lakuntza, Navarra, beginning and ending in the town plaza. Participants can select a 26 km race or a 13 km option, and a non-competitive walk is available for those who wish to traverse the mountain route without competing.
The course crosses Aralar Natural Park, marking it as a trail and mountain running event distinct from road races. Organized by Club Deportivo Zabalarte, the race is now in its twenty-first edition. The event incorporates chip timing, aid stations, mandatory equipment, and entry limits, indicating it should be approached as a structured mountain race.