Trail races in Basque Country — May 2026
The Basque Country is the birthplace of Spanish skyrunning with the legendary Zegama-Aizkorri. Green mountains, technical trails and an Atlantic climate that challenges even the most prepared runners.
2 races scheduled
Climate in Basque Country: The Atlantic climate means frequent rain year-round, but also mountains that are always green and mild temperatures. There's no truly bad season for running, though November to February combines rain with short days. From May to September days are long and temperatures pleasant (15-25 °C), though rain can appear without warning. Running here always requires a waterproof jacket in your pack — but that mud and mist are part of the Basque character.
Race summary
2
Races
4.5 – 42 km
Distance range
550 – 2736 D+
Elevation range
May
Race months
Difficulty
Tips for running in Basque Country in may
Sun protection: the sun is already strong in May. SPF 50+ cream, visor cap and sunglasses are essential.
If your race is in high mountains, still bring thermal layers: at high altitudes temperatures can drop below 5 °C.
May has a high volume of races: plan carefully if you have multiple objectives to avoid overtraining.
Race map
Click a marker to view race details.
Scheduled races
FeaturedPhoto: Zegama-AizkorriZegama-Aizkorri
Zegama
42K y KV por la Sierra de Aizkorri, la carrera de skyrunning más mítica de España
Photo: Mitxarro BiraMitxarro Bira
Araia
27,5K y 14K por la Sierra de Altzania en el Parque Natural de Aizkorri-Aratz
Essential trail running gear
Must-have gear to prepare for your mountain races
Black Diamond
Black Diamond Distance Carbon Z
Ultralight carbon Z-pole foldable trekking poles. 137 g per pole in 110 cm length, 33 cm folded. EVA grip and adjustable strap. The trail running reference.
Hoka
Hoka Speedgoat 7
The best-selling trail shoe in the US and an absolute ultra-trail classic. Max Hoka cushioning, a Vibram Megagrip outsole with 5 mm lugs for grip in mud and technical terrain, and a snug Matryx upper. Built to eat up kilometres without punishing your legs in long races.
Altra
Altra Lone Peak 9
Trail running shoe with zero drop and wide FootShape toe box that allows natural toe splay. 25 mm stack with EGO foam for balanced cushioning without losing ground contact. MaxTrac outsole with 3.5 mm lugs, ideal for non-technical trails, forest tracks and long-distance paths.
New Balance
New Balance Fresh Foam X Hierro v9
The model breaking into Spain's best-seller charts. Fresh Foam X midsole with a solid balance between cushioning and ground feel, a Vibram Megagrip outsole, and a comfortable last suited to wide feet. A reliable all-rounder for training runs and mountain races of any distance.
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