The La Palma race changes dates and features three trail distances alongside a demanding vertical climb.
A popular race in southern Mallorca offers two distances, an afternoon start and an urban course.
The Madrid event combines mountain biking, off-road running and several race formats for adults and young athletes.
The date and town are confirmed, but the course, registration and use of proceeds are still unclear.
The Albacete-area event returns on October 31; its recent history points to a well-attended day of popular racing.
A 10-kilometre road race connects two towns in the Deba valley on the afternoon of Oct. 31.
Obón hosts a day of trail running, mountain biking and duathlon, with two running distances and tiered entry fees.
Ten kilometres through Barcelona, an 8:50 a.m. start and tiered entry fees for the 2026 edition.
A 12-kilometre autumn race in Cantabria: the announced date, location and details still awaiting confirmation.
Laviana hosts an autumn mountain event with options to run, walk and introduce younger participants to trail running.
An 18-kilometer trail race, a 12-kilometer walking route and a morning start in Las Palas on Oct. 31, 2026.
Taradell hosts a mountain running day with three distances, historic trails and a start and finish at Plaça de les Eres.