Ultra-Trail Guara Somontano, live.

Starting from the cave below Alquézar’s castle

A trail weekend in the canyon country of the Sierra de Guara, with every race starting under the castle of Alquézar and finishing in its streets.

Ultra-Trail Guara Somontano is held from 2 to 4 October 2026 in Alquézar, in the province of Huesca. All four races start at Cueva Mullón, below the castle, and finish on Calle Nueva by the Frontón. The organiser dates the race to 2009, which makes it one of the earlier ultra-trails on the Spanish calendar, and in 2025 the long course was redrawn to be harder and wilder.

On Saturday 3 October the 82 km, with 4,700 metres of ascent and a 20-hour limit, starts at 03:00; it goes down to the Río Vero and its walkways, out to Mesón de Sevil, on to Rodellar for a loop through the Mascún gorge and the abandoned village of Otín, and back over the Tozal de los Tiestos. The Vuelta a Sevil, 48 km and 2,500 metres, starts at 07:00, and the Trail del Vero, 30 km and 1,400 metres, at 08:00. On Sunday the Trail Alquézar Rosado, 17 km and 850 metres, starts at 09:00. Kids’ races are run on Saturday evening at the finish.

Canyon ground and phone signal do not get along, and the 82 km spends hours in gorges far from Alquézar. Each runner can share a link to their own Livebib broadcast; family and friends open it in a browser, with no account or app, and see the runner’s position on the course line, the distance covered and a finish estimate for Calle Nueva that updates as the race goes. Anything estimated is marked as estimated, and when the signal drops in a barranco the position is carried forward along the course instead of freezing. The runner decides who gets the link.