4.8
(3)
75
riders
8
rides
Gravel biking around Quirós is characterized by its mountainous terrain within the Natural Park of Las Ubiñas-La Mesa, featuring rugged landscapes, deep gorges, and river valleys. The region offers a mix of former railway lines converted into greenways, such as the Senda del Oso, alongside challenging mountain passes. Cyclists navigate through varied surfaces, including paved sections, gravel paths, and forest tracks, often encountering significant elevation changes. The area's natural features include numerous tunnels, rehabilitated bridges, and traditional stone villages nestled…
Last updated: July 8, 2026
34
riders
Hard gravel ride. Very good fitness required. You may need to push your bike for some segments of this route.
4.5
(2)
22
riders
44.8km
02:55
520m
520m
Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.

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2
riders
52.8km
05:08
1,680m
1,680m
Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.
1
riders
51.2km
04:28
1,680m
1,680m
Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.
10
riders
42.6km
03:35
1,500m
1,500m
Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.
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It's very interesting to take a look at
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Very interesting to visit
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Spectacular view
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Upon reaching the summit, you don't arrive at a village or a tourist center, but rather at a kind of natural balcony overlooking the Lena mountain passes, which gives a strange feeling, as if you've stepped onto an empty stage. And on clear days, the wind is louder among the mountain passes than any car, because traffic is minimal.
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For decades, La Cubilla was practically a ghost town: a road built to connect mining valleys, used more by livestock farmers and scattered trucks than by travelers. This lack of traffic left a remarkably clean route, free of curves, absurd straights, and modern widenings: pure mountain design from another era. That's why many cyclists say it "looks more like an Alpine pass than a Cantabrian one," with those giant limestone walls silently accompanying you.
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Pola de Lena is a town steeped in industrial history. It is strategically located at the entrance to Asturias via the highway from León and is an important commercial hub. It is also perfectly situated for starting cycling routes in the surrounding mountains.
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The La Cubilla mountain pass is located at an altitude of 1,683 meters, on the border between Asturias and León. Its rugged terrain and the beauty of its surroundings have earned it the title of stage finisher of the Vuelta a España, making it one of the most iconic climbs among cyclists.
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The LN-8 highway enters the protected natural area of Las Ubiñas-La Mesa and its surrounding villages. If you continue ascending, you'll reach the famous La Cubilla mountain pass. The climb follows a spectacular road between mountains and traditional villages.
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There are currently 7 gravel bike routes documented in Quirós on komoot, offering a variety of challenging experiences for cyclists.
While most routes in Quirós are rated as difficult due to significant elevation changes, sections of the Senda del Oso (Bear Trail), which is integrated into longer tours, offer a more gentle and relatively flat experience, making them suitable for families or those seeking an easier ride. The Senda del Oso is a former railway line converted into a greenway, known for its pleasant terrain.
The best times to visit Quirós for gravel biking are spring, summer, and autumn. During these seasons, the weather is generally pleasant, and the surrounding landscapes are vibrant with greenery or rich autumnal colors, enhancing the riding experience. Winter can be challenging due to mountain conditions.
Gravel biking in Quirós offers a diverse terrain. You'll encounter a mix of former railway lines converted into greenways like the Senda del Oso, alongside challenging mountain passes such as La Cubilla. Routes feature varied surfaces, including paved sections, gravel paths, and forest tracks, often with significant elevation changes. The region is characterized by rugged landscapes, deep gorges, and river valleys.
Yes, Quirós offers several excellent loop trails for gravel bikers. Popular options include the Mine Railway Tunnel – Stone Bridge of Proaza loop from Proaza, the Section through trees near Salas – Santa Cristina de Lena loop from Pola de Lena, and the challenging La Cubilla Pass loop from Las Fuentes.
The trails in Quirós pass through stunning natural landscapes and offer glimpses of historical sites. You can expect to see impressive gorges and tunnels, rehabilitated bridges over rivers, and traditional stone villages. The Senda del Oso, for instance, features tunnels and bridges, and is near the Valdemurrio Reservoir. The region is also within the Natural Park of Las Ubiñas-La Mesa, known for its mountains and serene lakes like Lago de la Cueva and Lake Calabazosa.
The area is highly rated by the komoot community, with an average score of 4.75 stars. Reviewers often praise the challenging yet rewarding routes, the stunning natural beauty of the Natural Park of Las Ubiñas-La Mesa, and the unique experience of cycling along the Senda del Oso, with its tunnels and river crossings.
Many routes offer spectacular views, especially those climbing into the Natural Park of Las Ubiñas-La Mesa or ascending mountain passes like La Cubilla. The Valdemurrio Reservoir area is particularly scenic, especially in autumn, and offers picturesque paths. You can also find viewpoints like View of Lago de la Cueva.
Yes, there are options for refreshments and accommodation. Along some routes, or in nearby villages, you can find places like Casa Generosa Mountain Inn or La Posada de Proaza. The region also has various huts and inns that cater to outdoor enthusiasts.
Yes, the Senda del Oso is a significant feature in the region's gravel biking network. A prominent route that combines sections of this greenway with climbs into the natural park is the Gravel tour to the Natural Park of Las Ubiñas-La Mesa along the Senda del Oso (Bear Trail), offering a comprehensive experience of the area's diverse landscapes.
Gravel routes in Quirós are known for their challenging elevation profiles. For example, the Gravel tour to the Natural Park of Las Ubiñas-La Mesa involves over 1800 meters of ascent, while the La Cubilla Pass loop features nearly 1500 meters of climbing, indicating the mountainous nature of the region.
Beyond the significant elevation changes, gravel trails in Quirós feature unique elements like old railway tunnels and rehabilitated bridges, particularly along the Senda del Oso. The region's rugged terrain, deep gorges, and the presence of challenging mountain passes like La Cubilla add to the adventurous character of the rides.


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