Setcases will host the race on September 5, 2027, but route, registration and start-time details are still pending.
Two routes, Ebro Valley trails and an autumn race starting in Lodosa.
A mountain loop, hourly starts and a full night on the move shape this demanding León race.
The event connects the Pyrenees and Catalan coast over 32 legs, with teams of up to 12 runners and overnight racing.
Two days of sport in Béjar will feature an ultra, a marathon, a shorter run and mountain bike courses.
The Toledo-area event has a date, three race distances and a separate hiking option.
Covadonga hosts a mountain trail event on May 8, featuring two distances and a course shaped by the Asturian landscape.
Beasain brings back its mountain marathon in July 2027, with a demanding climbing profile.
Espinosa de los Monteros hosts three mountain distances on June 5, 2027, with up to 3,700 metres of elevation gain.
Two distances, elevation gain and protected landscapes shape this mountain race in Casas Bajas in June 2027.
The Aragonese mountain race already has a date; course details and race conditions are still to be finalised.
Azpeitia hosts a mountain-running event in May 2027, with two courses and up to 4,000 metres of elevation gain.