Best mountain passes around Mutiloa traverse mountainous terrain, offering routes and *collados* (mountain saddles or cols). The region features scenic hiking trails and greenways, often rich in history. These routes provide panoramic views of valleys and surrounding natural landscapes. Mutiloa's passes are characterized by their natural beauty and historical significance.
Last updated: June 17, 2026
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Just above the San Adrián tunnel. You have to be a little careful on the last climb.
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This impressive hill has a long pastoral tradition. In its meadows you can see sheep and cows grazing among the limestone cliffs with a spectacular background view of valleys and mountains.
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The Otzaurte pass, 625 meters high and crowned with a hermitage and an inn, marks the gateway to the Aizkorri-Aratz Natural Park.
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But keep in mind that all those that go to the south go up, logically, on the north faces, come on, they are usually full of mud ... better for when the weather is good.
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The Venta de Otzaurte car park, right next to the hermitage, is the starting point for numerous mountain routes
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Atagoiti is located in Basque Country. From Ormaiztegi, the Atagoiti is 9.5 km long. Along this distance 322 altimeters are bridged. The average slope of the rise is, therefore, 3.4%.
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Udana from Oñati is a climb in the Basque Country region. It has a length of 6.9 kilometers and an ascent of 270 vertical meters with a slope of 3.9% on average. The top of the ascent is located at 515 meters above sea level.
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Summit over the Calzada de San Adrian tunnel
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Some of the most appreciated mountain passes include the Udana Pass Ascent, a challenging climb in the Basque Country region, and Atagoiti, another significant climb from Ormaiztegi. Additionally, Collado de Biozkorna is known for its pastoral tradition and stunning views.
Yes, the Mutiloa-Ormaiztegi Greenway (Vía Verde) follows an old railway line that once transported iron and coal from the mines of Mutiloa. This route offers a unique blend of history and natural beauty, providing panoramic views and glimpses of historical remnants like settling pond dikes. Collado de Biozkorna also has a long pastoral tradition, with sheep and cows grazing among limestone cliffs.
The mountain passes around Mutiloa offer magnificent panoramic views. For instance, the Mutiloa-Ormaiztegi Greenway provides expansive views of the Troi Valley, Mutiloa, and the Estanda Valley. From Collado de Biozkorna, you can enjoy extraordinary vistas overlooking the Gipuzkoan side of the mountain range, with a spectacular background view of valleys and mountains. The Liernia mountain pass, part of the greenway, offers views of the impressive Sierra de Aizkorri mountain barrier.
The Mutiloa-Ormaiztegi Greenway (Vía Verde) is an ideal route for walking or cycling, even with children, despite an initial slope. It's well-signposted and offers a gentle way to experience the region's natural beauty and history.
The region offers a variety of outdoor activities. You can find numerous hiking trails, such as the 'Aizpea Lime Kilns – Zerain loop from Mutiloa' or the 'Barrendiola Reservoir – Collado de Biozkorna loop from Brinkola'. For cycling enthusiasts, there are gravel biking routes like the 'Mirandaola Forge and Park – Udana Pass Ascent loop from Legazpi'. You can explore more options on the hiking guide, running guide, and gravel biking guide for Mutiloa.
Collado de Biozkorna is a tilted plateau at approximately 1,200 meters above sea level, offering remarkable vistas. A unique feature are the 'lainoharriak' or 'fog stones,' small stone monoliths aligned to help shepherds, ranchers, and hikers navigate during foggy conditions, showcasing traditional methods of wayfinding.
Yes, for example, the Venta de Otzaurte car park, located right next to the hermitage at Otzaurte pass, serves as a starting point for numerous mountain routes. It's a convenient spot if you're planning to explore the Aizkorri-Aratz Natural Park.
While the region is beautiful year-round, it's generally better to visit when the weather is good, especially for routes that might become muddy. Spring and autumn often offer pleasant temperatures and vibrant landscapes. For passes like Otzaurte, routes going to the south on north faces can be full of mud, so drier conditions are preferable.
Yes, reaching Collado de Biozkorna is considered a hard hike, requiring good fitness, sure-footedness, and sturdy shoes. The effort is rewarded with remarkable vistas. The Udana Pass Ascent is also an intermediate climb with a length of 6.9 kilometers and an ascent of 270 vertical meters.
Otzaurte pass, at 625 meters high, is crowned with a hermitage and an inn, marking the gateway to the Aizkorri-Aratz Natural Park. It's a popular starting point for many mountain routes, offering facilities and parking. You can enjoy views and experience the transition into the natural park.
The mountainous terrain and natural parks like Aizkorri-Aratz are home to diverse wildlife. While specific sightings vary, you might encounter various bird species, local mammals, and grazing animals like sheep and cows, especially in pastoral areas such as Collado de Biozkorna.
Many passes offer excellent viewpoints. Collado de Biozkorna provides extraordinary views over the Gipuzkoan side of the mountain range. The Mutiloa-Ormaiztegi Greenway also features points with magnificent panoramic views of the valleys below and surrounding woodlands. Leizarrate Summit (1,053 m), just above the San Adrián tunnel, is another notable viewpoint.


See even more epic mountain passes by checking out these guides around Mutiloa: