Mountain peaks around Zerain are situated within the Aizkorri-Aratz Natural Park, a region characterized by its limestone mountains and dense beech forests. This area is home to the highest summit in the Basque Autonomous Community, Aitxuri, and features a dramatic karstic landscape. The park also contains significant historical and cultural heritage, including ancient pilgrimage routes and megalithic monuments. Exploring these peaks offers access to diverse natural environments and panoramic views.
Last updated: May 10, 2026
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What's the deal with the names? Are "aketegi" and "aitxuri" the same thing?
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One of the highest points in the Basque Country, let yourself be enveloped by the fog and it will seem like a magical place.
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Aratz. 1445 m is the main summit of the Altzaina massif. Category +1 in the province of Alava
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Pay special attention to the gorges. Of course, the views are very beautiful.
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It is the highest point of the route. You will have beautiful views after the demanding climb. It is a technical climb due to the state of the terrain, especially if it is wet or foggy.
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Summit separated from the rest of the summits of the Aizkorri mountain range. Not for that less beautiful. The crest is usually windy.
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Among the most popular peaks, Aizkorri Summit (1,523 m) stands out. It features a historic Santo Cristo hermitage and a refuge hut, offering extensive views across the Guipuzcoan and Álava landscapes. Another highly regarded peak is Aketegi Summit, known as an emblem of the Sierra with impressive vistas.
Aitxuri, at 1,551 meters (5,089 ft), is the highest peak in the Basque Country. It offers a challenging mountaineering route and rewards experienced hikers with unparalleled panoramic views across the Basque landscape.
Yes, Aratz Summit (1,445 m) is notable for its rocky, less vegetated surface, offering a distinct landscape compared to the surrounding forested areas. It's part of the Altzania mountain range and contributes to the Aizkorri-Aratz Natural Park's characteristic limestone karstic landscape.
The Aizkorri-Aratz Natural Park, where Zerain's peaks are located, is rich in natural beauty. You'll encounter dramatic karstic landscapes with ridges, sinkholes, and ravines, extensive beech forests like Iturrigorri, and picturesque Urbia meadows. The area is also home to impressive caves such as Arrikrutz.
The region boasts a rich historical and cultural heritage. The historic Santo Cristo hermitage and a refuge hut are located at the summit of Aizkorri Summit (1,523 m). Additionally, the renowned San Adrián tunnel, part of ancient pilgrimage routes, and numerous dolmens and megalithic monuments are found within the Aizkorri-Aratz Natural Park. The modern Sanctuary of Arantzazu also serves as a significant landmark and trailhead.
Absolutely. The ascent to Aitxuri is considered a hard mountaineering route, often undertaken as part of a loop that can include Aizkorri and Aketegi. The ridge traverse, particularly between Aketegi and Aitxuri, demands experience due to its aerial nature and steep drops. Routes to Illarrabeltxeko Gaina Summit also involve demanding and technical climbs.
Beyond hiking and mountaineering, you can explore various outdoor activities. There are numerous MTB Trails around Zerain and options for Gravel biking around Zerain. For those focused on walking, dedicated Mountain Hikes around Zerain offer a range of routes.
While the region can be enjoyed year-round, spring and autumn generally offer the most pleasant conditions for hiking. During these seasons, temperatures are milder, and the natural park's beech forests display vibrant colors, enhancing the scenic beauty. Summers can be warm, and winters may bring snow to higher elevations, requiring appropriate gear and experience.
Yes, the Aizkorri-Aratz Natural Park is home to diverse wildlife. Visitors often have the chance to encounter a large colony of Griffon vultures soaring above the peaks. You can also observe traditional Basque life with Latxa sheep grazing in the Urbia meadows.
Many peaks in the area provide stunning views. From Aizkorri Summit (1,523 m), you can see extensive panoramas of the Guipuzcoan and Álava landscapes. Altzabal (1,518 m) also offers very beautiful views, especially paying attention to the gorges. The views from Aitxuri and Aketegi are also described as absolutely impressive, encompassing the rugged karstic formations and expansive forests.
The terrain around Zerain's peaks, particularly within the Aizkorri-Aratz Natural Park, is characterized by limestone mountains and karstic formations. This means you can expect rocky paths, steep ascents and descents, and potentially aerial ridge traverses. Elevations range significantly, with the highest peak, Aitxuri, reaching 1,551 meters, ensuring challenging climbs and substantial elevation gains on many routes.


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