The Aizkorri-Aratz Mountain Range accommodates the highest summits in the Cantabrian-Mediterranean watershed, such as Aitxuri (1,551 m) and Aizkorri (1,523 m), as well as other mountains, which all together form a beautiful massif that is a point of reference for the Basque mountaineering. This area covers a surface of 16,000 hectares and the “main entrance” to the natural park is located in the Sanctuary of Arantzazu.
Furthermore, three of the main rivers in Gipuzkoa have their sources on the foothills of these limestone mountains. The karst phenomena and landscapes are also very remarkable. The course of the groundwater has created more than 15 km of galleries, where the Oñati-Arrikrutz stand for a visit. Trip and ideal routes.
The Aizkorri-Aratz Natural Park has numerous open-air sites. This park offers an interesting historical and cultural heritage.