Intxixu Trail is a mountain race in Oiartzun, Basque Country, starting and finishing in Uztapide plaza, Ergoien area. It takes place in June, with the route crossing Aiako Harria Natural Park. This is a trail race focused on local mountain terrain, not city streets.
The event started in 2014 and is now in its eleventh edition, with a two-year pause due to COVID. Runners pick up bibs on race morning; they must be worn visibly on the chest. Only registered participants may be on the course or receive assistance from the organization. The organizers also host a free pre-race roundtable at Elorsoro sports center covering training and nutrition, fostering a community atmosphere beyond the start line.