Mountain passes around La Pola de Gordón are situated within the Alto Bernesga Biosphere Reserve in the Cantabrian Mountains. This region offers varied mountainous terrain and routes, featuring prominent peaks and extensive trail networks. The area is characterized by its natural landscapes and provides opportunities for exploration.
Last updated: July 10, 2026
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The path winds between rock walls, the murmur of the stream accompanying every step. For centuries, it was a thoroughfare for muleteers and pilgrims seeking the north, following the water's course. On rainy days, the air smells of damp earth and heather, and the landscape seems wilder, as if the path itself were reminding us that here, the mountain always reigns supreme.
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The Aralla Pass is a mountain pass located in the province of León, Spain, at an altitude of 1,536 meters. It is crossed by the LE-473 highway and connects Aralla de Luna (municipality of Sena de Luna) with Geras (municipality of La Pola de Gordón). It has an average gradient of around 7%, with no steep but steady slopes, generally classified as a second-category cycling pass. The climb offers beautiful views and can be combined with routes to the Arbás Valley and Villamanín, although some roads may be in uneven condition. At the summit, there is a monument in memory of the victims of the Civil War, highlighting the figure of Captain Rodríguez Lozano, who was shot in 1936. The area is popular for motorcycle tours and hiking, with several restaurants and local products such as cured meats in Geras and Aralla. In winter, the road is often impassable due to snow and snow removal service is poor.
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Course with only a few delicate passages, otherwise smooth and fun. The views are exceptional.
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Beautiful pass with magnificent views over the Tres Marías and the Arbás valley.
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The views from this hill are well worth a stop to enjoy a mountain landscape with a beautiful beech forest.
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We are in the Collada Gistreo, located at an altitude of 1,634 meters, from where we have perfect views of the Tres Marías and the entire valley.
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Nice path that runs along the spine of the Collado Cimero with beautiful views over the Orzonaga beech forest. This path joins with the Cimero Refuge.
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The region offers several significant passes and high points. Aralla Pass is a distinct mountain pass at 1,536 meters, known for its cycling routes. You can also explore Collada Gistreo (1,634 m), which provides excellent views of the Tres Marías and the surrounding valley. Additionally, areas like Pico Fontañán and Cueto San Mateo, while peaks, offer routes with pass-like experiences and stunning panoramas.
Many passes and high points offer impressive panoramic views. From Pico Fontañán, you can see the Bernesga Valley and the Cantabrian mountain range. Collada Gistreo (1,634 m) provides perfect views of the Tres Marías and the entire valley. Similarly, routes to Cueto San Mateo offer some of the best panoramic views of northern León.
Yes, the region has historical significance. Pico Fontañán, for instance, features remnants of trenches and an anti-aircraft bunker from the Spanish Civil War, part of what's known as the 'Maginot Cantábrica.' Aralla Pass also has a monument in memory of Civil War victims at its summit.
The area is excellent for various outdoor activities. You can find numerous hiking trails, including routes to Pico Fontañán and Cueto San Mateo. For cyclists, Aralla Pass is a popular choice, and the Zona Alfa MTB Trails offer over 100 km of mountain biking routes. You can explore more hiking options on the Hiking around La Pola De Gordón guide and cycling routes on the Road Cycling Routes around La Pola De Gordón guide.
While specific passes might involve moderate difficulty, many routes leading to high-altitude areas pass through beautiful forests of oak and beech, offering varied natural scenery that can be enjoyed by families. For example, the ascent to Pico Fontañán is considered a good destination for a mountain day without excessive complications. Always check the specific route details for difficulty and length.
The best time to visit is generally during the warmer months, from spring through autumn, when the weather is more stable and trails are clear. In winter, roads to passes like Aralla Pass can often be impassable due to snow, and snow removal services may be poor. Spring and autumn also offer the chance to see diverse flora, including various mushroom species.
The region is rich in natural beauty. Routes often take you through stunning oak and beech forests. You can observe diverse flora, including various mushroom species in season, and encounter wildlife such as robins, greenfinches, magpies, cuckoos, weasels, mice, squirrels, wild boars, and roe deer, especially on routes to peaks like Cueto San Mateo.
Yes, the Collado Cimero Ridge Singletrack is a notable trail that runs along the spine of Collado Cimero. It offers beautiful views over the Orzonaga beech forest and is described as a fun singletrack with exceptional views, making it a unique experience for hikers and mountain bikers.
Cycling passes vary in difficulty. Aralla Pass, for example, is classified as a second-category cycling pass with an average gradient of about 7%, offering a rewarding but not overly strenuous ascent. The Zona Alfa MTB Trails cater to all skill levels, from easy to advanced, with various types of terrain including technical sections and flow trails.
Yes, on routes to peaks like Cueto San Mateo, you might encounter small mountain refuges. Additionally, areas like Collada Collarriondo are ideal places to take a break and recover energy while enjoying magnificent views.
Visitors particularly appreciate the breathtaking scenery, the diverse natural environment, and the opportunities for outdoor activities like hiking and cycling. The panoramic views from high points like Pico Fontañán and Collada Gistreo (1,634 m) are frequently highlighted, as are the historical insights offered by sites such as those found near Pico Fontañán and Aralla Pass.


See even more epic mountain passes by checking out these guides around La Pola De Gordón: