4.5
(2)
18
hikers
3
hikes
Mountaineering routes around Alonsotegi are set within the mountainous terrain of the Basque Country, characterized by significant ranges like Sierra Sasiburu and the massifs of Ganekogorta and Pagasarri. Elevations in the area range from 50 to 1,000 meters above sea level, offering varied ascents. The municipality is situated in the Cadagua River valley, with tributaries flowing from the mountains, contributing to the landscape. This region provides a range of mountaineering experiences across its diverse natural features.
Last updated: October 22, 2026
4.0
(1)
11
hikers
Hard mountaineering route. Very good fitness required. Mostly walkable paths. Sure-footedness required.
5.0
(1)
5
hikers
16.0km
05:15
700m
700m
Hard mountaineering route. Very good fitness required. Easily walkable paths.

2
hikers
Moderate mountaineering route. Good fitness required. Mostly walkable paths. Sure-footedness required.
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Of all the surrounding peaks, this is the most comfortable.
1
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Telecommunications antennas next to the mailbox. This peak is included in the catalogue of Centenary Peaks of Euskal Herria. However, its fame goes to its neighbour Pagasarri.
0
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Summit listed in the Catalogue of Centenaries
0
0
Beautiful place to take a break and nice with all those steep hills
12
0
Great place to take a break, the hills are steep and life is too short, so enjoy it now.
0
0
beautiful point when the weather is nice, even now
14
0
Incredible stretch of GR228 hiking route from Bilbao to Monte Pagasarri. The trail is well marked and the brave will get a panoramic view of the mountains and valleys below.
1
0
The top of Erreztaleku rises to 586 meters above sea level. From this purely natural corner you can see the city of Bilbao, quietly and quietly. If the day is not clear, you may see a sea of clouds.
1
0
Alonsotegi offers a variety of mountaineering experiences, from moderate paths to challenging ascents. The region is characterized by significant mountain ranges like Sierra Sasiburu and the massifs of Ganekogorta and Pagasarri, with elevations ranging from 50 to 1,000 meters above sea level. You'll find routes that traverse old mines, lead to prominent peaks with panoramic views, and explore scenic valleys.
While many routes in Alonsotegi are considered difficult, there are options for those seeking a more moderate challenge. For example, the Kamaraka – Mugarriluze loop from Ermuko Andre Mariaren santutegia is a moderate 7.3 km trail that takes approximately 2 hours 37 minutes to complete, offering a good introduction to the area's terrain.
For experienced mountaineers, Alonsotegi presents several demanding routes. The Ganeran Summit – Gasteran Peak loop from Larreinetako funikularraren geltokia is a difficult 17.4 km trail with significant elevation gain, typically taking over 5 hours. Another challenging option is the Ganekondo / Gastarriaga – Ganekogorta loop from Bilbao Arena, a 16.3 km difficult path that includes a substantial ascent towards Ganekogorta, a notable mountain in Biscay.
Yes, Alonsotegi features several circular routes that allow you to start and end at the same point. Examples include the Ganeran Summit – Gasteran Peak loop and the Pagasarri Picnic Area – Mount Pagasarri loop. These loops offer varied terrain and panoramic views, making for a fulfilling day out.
The mountaineering routes around Alonsotegi offer access to several impressive natural landmarks and viewpoints. You can reach the Ganekogorta Summit, known for its spectacular panoramic views, or explore the Eretza Summit (887 m). The Sasiburu range also provides impressive views of the Kadagua valley from its pass.
Yes, the region is rich in history. Along some routes, such as the Ruta de las Minas y Sales, you can discover old mines and ancient stones. The Hirumugarrieta Megalithic Site is another historical point of interest. Additionally, the
The mountaineering routes in Alonsotegi are highly regarded by the komoot community, holding an average rating of 4.0 stars from over 3 reviews. Many mountaineers appreciate the diverse terrain, the challenging ascents to prominent peaks, and the stunning panoramic views offered throughout the region.
The mountainous terrain of Alonsotegi can be enjoyed throughout much of the year. While specific conditions vary, spring and autumn generally offer pleasant temperatures and vibrant landscapes. Summer provides longer daylight hours for extended treks, and winter mountaineering is possible for those with appropriate experience and gear, though conditions can be more challenging.
Yes, the Cadagua River valley, where Alonsotegi is situated, features several water bodies. The Lingorta Reservoir, formed by mountain streams, adds to the natural beauty. You can also find highlights like Pozo Hostión and the Gorostiza Reservoir, which can be explored in conjunction with your mountaineering adventures.
There are several mountaineering routes detailed for the Alonsotegi area, with a total of 4 featured in this guide. These routes offer a range of difficulties, from moderate to difficult, catering to various skill levels.
Mountaineering routes in Alonsotegi feature significant elevation gains, reflecting the region's mountainous character. For example, the Ganekondo / Gastarriaga – Ganekogorta loop involves an ascent of over 900 meters, while the Pagasarri Picnic Area – Mount Pagasarri loop has an elevation gain of over 700 meters. Even moderate routes like the Kamaraka – Mugarriluze loop still include nearly 400 meters of ascent.

