Aizkorri, Limestone mountain summit in Zegama, Spain.
Aizkorri is a limestone summit reaching 1,523 meters (5,000 feet) that forms part of the massif between Álava and Guipúzcoa provinces. The mountain displays typical karst features with steep rock faces and exposed stone slopes.
A mountain shelter was built in 1934 to provide refuge for shepherds and hikers. Together with the Santo Cristo chapel at the summit, these structures mark centuries of human activity on the peak.
The name Aizkorri comes from Basque words referring to the reddish or bare stone that covers the peak. Locals and hikers use this name as part of their everyday connection to the mountains.
The main approach from the north begins at Aranzazu Sanctuary in Guipúzcoa, while the southern route passes through Otzaurte Pass from Navarra. Both paths offer varying difficulty levels and meet at the summit.
The Zegama-Aizkorri mountain marathon takes place each spring and sends runners on a circuit route through karst landscapes around the massif. The competition attracts athletes from across the region who tackle the technical terrain and elevation changes.
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