4.2
(64)
1,462
riders
185
rides
Mountain biking around Ason, located in Cantabria, offers a diverse landscape for riders. The region is characterized by its mountainous terrain, including significant peaks and passes like La Sía and Picón Blanco, as well as natural parks such as Collados del Asón. Riders can expect varied elevations, from river valleys to high mountain areas, providing a range of challenging ascents and descents. The area features a mix of open landscapes and forested sections, typical of northern Spain's rugged interior.
Last updated: May 10, 2026
50.2km
04:43
1,480m
1,480m
This difficult 31.2-mile circular mountain biking route, Campo La Cruz y Alto de Fuente Las Varas, offers challenging climbs and great views
51.1km
05:27
1,830m
1,830m
This difficult 31.7-mile mountain bike route climbs 6004 feet through the Valles Pasiegos to Picón Blanco for panoramic views.

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Hard mountain bike ride. Good fitness required. Advanced riding skills necessary. Some portions of the route may require you to push your bike.
15
riders
64.1km
06:57
2,100m
2,100m
Hard mountain bike ride. Very good fitness required. Advanced riding skills necessary.
9
riders
25.1km
02:28
880m
880m
Hard mountain bike ride. Good fitness required. Advanced riding skills necessary. Some portions of the route may require you to push your bike.
6
riders
31.2km
03:22
1,080m
1,080m
Hard mountain bike ride. Very good fitness required. Suitable for all skill levels.
6
riders
92.3km
07:15
2,010m
2,010m
Hard mountain bike ride. Very good fitness required. Advanced riding skills necessary.
8
riders
32.1km
02:41
980m
980m
Hard mountain bike ride. Very good fitness required. Suitable for all skill levels.
7
riders
50.9km
04:09
1,480m
1,480m
Hard mountain bike ride. Very good fitness required. Suitable for all skill levels.
6
riders
31.8km
03:07
940m
940m
Hard mountain bike ride. Very good fitness required. Suitable for all skill levels.
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Popular around Ason
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MTB Trails around National Park los Collados del Asón
The monument pays homage to the "putxera," a traditional way of cooking bean stew typical of the Balmaseda region. The "putxera" is a special pot originally used by railway workers in the area. They used the heat from steam locomotives to cook their meals. The monument is made of iron and features a relief depiction of a steam locomotive, commemorating the origins of the "putxera."
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The bridge was built in the 11th century and served as an important crossing point on the old road to Castile. It crosses the Cadagua River and is one of the city's landmarks. The bridge consists of three arches and has a Gothic tower added in the 15th century. This tower was formerly used to collect tolls.
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The monastery was built in the 17th century and is one of the city's most important historical buildings. It was built in the Baroque style and has been listed as a cultural asset since 1994. The building originally served as a convent for the Poor Clares. Today it houses the city's cultural center, where various events and exhibitions take place.
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The church is dedicated to Saint Severinus of Noricum, the patron saint of prisoners. It was built in the 15th century in the Gothic style. The church is located in the main square of Balmaseda.
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Uphill road with beautiful views and a quick descent towards Treto
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That's not correct. From Los Tornos, you can't see Lanestosa. :( If you went up the N-620, you've passed through Lanestosa. But from the top of the pass, what you see is Soba. ;) If you went up through Fresnedo, you can't see it either.
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Spectacular panoramic views. Right in the valley ahead, Lanestosa, the westernmost town in Bizkaia bordering Cantabria.
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When you want to stop the survey, always keep the back wheel between your legs, it won't fall off ✌️✌️🍀
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Ason, located in Cantabria, offers a diverse range of mountain bike trails. You'll encounter mountainous terrain with significant peaks and passes like La Sía and Picón Blanco, as well as routes through natural parks such as Collados del Asón. The trails feature varied elevations, from river valleys to high mountain areas, providing a mix of challenging ascents and descents through open landscapes and forested sections.
There are nearly 200 mountain bike trails around Ason listed on komoot. This includes 9 easy routes, 95 moderate routes, and 85 difficult routes, ensuring options for various skill levels.
Yes, Ason offers 9 easy mountain bike routes, perfect for beginners or those looking for a more relaxed ride. These trails typically have less demanding climbs and descents, allowing riders to enjoy the scenery at a comfortable pace.
Experienced riders will find plenty of challenges in Ason, with 85 difficult routes available. Trails like Campo La Cruz y Alto de Fuente Las Varas – circular desde La Aparecida and Puerto de La Sía por Picón Blanco – circular por los puertos pasiegos feature demanding ascents and significant elevation changes, offering a true test of skill and endurance.
The mountain bike trails in Ason vary significantly in length and duration. For example, the Nacimiento del río Asón y Alto de la Posadía – circular por el Parque Natural de los Collados del Asón is about 14.3 miles (23.0 km) and takes around 2 hours 37 minutes, while longer routes like La Sía Pass – Puerto de los Tornos Viewpoint loop from Gibaja can extend to over 57 miles (92 km) and take more than 7 hours.
The mountain bike routes in Ason are highly regarded by the komoot community, with an average rating of 4.3 stars from over 60 reviews. More than 1,400 mountain bikers have explored the varied terrain, often praising the challenging climbs, panoramic views, and the natural beauty of the region's mountain passes and natural parks.
Yes, Ason is rich in natural beauty. You can find stunning viewpoints like Alto de la Posadía and Covalruyo Viewpoint. The famous Asón Waterfall is another highlight, and you might also encounter impressive geological features like Cullalvera Cave and Canal Honda gorge.
Many of the mountain bike trails in Ason are designed as circular routes, allowing you to start and end at the same point. Examples include Campo La Cruz y Alto de Fuente Las Varas – circular desde La Aparecida and Puerto de La Sía por Picón Blanco – circular por los puertos pasiegos, which are popular choices among local riders.
Given Ason's location in Cantabria, northern Spain, the spring and autumn months generally offer the most pleasant conditions for mountain biking. Temperatures are milder, and the natural landscapes are vibrant. Summer can also be good, especially in higher elevations, but be prepared for warmer weather. Winter riding might be possible, but some higher mountain passes could be affected by snow or colder conditions.
Yes, several routes traverse the region's natural parks. For instance, the Nacimiento del río Asón y Alto de la Posadía – circular por el Parque Natural de los Collados del Asón takes you directly through the Parque Natural de los Collados del Asón, offering stunning natural scenery.
Ason is known for its mountainous terrain and passes. Many routes incorporate these features, such as the Picnic Area by the Asón River – La Sía Pass loop from Arredondo, which includes the notable La Sía Pass. These trails often provide challenging climbs and rewarding views.


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