A pre-dawn swim, demanding climbs and a mountain trail define this event in Jaén.
Swimming, cycling and a marathon: the Basque full-distance race has a date for 2027.
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.
3rd PROVITAL Backyard Ultra Gran Canaria: 15 May 2027 at El Confital. Unlimited 6.706 km laps, Challenge, Fun Run, and entries from 12 November.
Espinosa de los Monteros hosts three mountain distances on June 5, 2027, with up to 3,700 metres of elevation gain.
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.
A trail-running event in Zaragoza will feature several routes around Mount Moncayo, with its September 2027 date confirmed.
The Canary Islands event reaches its 35th edition with a new race organiser and a confirmed date in May 2027.