4.6
(14)
239
riders
23
rides
Touring cycling around Caso, a municipality in Asturias, Spain, offers diverse terrain within the Redes Natural Park, a UNESCO Biosphere Reserve. The landscape is characterized by glacial valleys, mountain peaks, and extensive forests of beech and oak. The River Nalón originates within the park, contributing to the region's natural features. This area provides a network of routes suitable for exploring its varied topography.
Last updated: June 23, 2026
2
riders
44.2km
03:26
1,190m
1,190m
Hard bike ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.
5.0
(2)
20
riders
60.0km
03:43
600m
600m
Hard bike ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.

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14
riders
21.5km
02:32
810m
810m
Hard bike ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.
5.0
(2)
7
riders
69.7km
05:33
1,320m
1,320m
Hard bike ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.
12
riders
37.9km
02:55
1,010m
1,010m
Hard bike ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.
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The Tarna Pass seems hidden from tourism and constant traffic. It's located on one of the least-traveled and most beautiful passes between Asturias and León. The scenery at the top is spectacular.
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This mountain pass, between Asturias and León, rises 1,520 meters above sea level. The ascent on both sides is spectacular, immersing you in an unforgettable mountain landscape.
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This road runs along the bottom of the Aller River valley and crosses spectacular mountain scenery. You'll surely be tempted to stop and take photos and admire the landscape.
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La Felechosa is a town steeped in mining and livestock traditions in the municipality of Aller. It is located at the gateway to the beautiful Asturian mountains, especially the Fuentes de Invierno ski resort. Its well-preserved historic center offers a varied culinary offering.
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Riaño, known as the "new Riaño," rises next to the reservoir that bears its name, surrounded by spectacular mountains in the heart of the León mountains. It is a picturesque and strategic location for exploring the surrounding peaks and valleys, as well as the Picos de Europa.
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The Puerto de La Tarna, from Riaño, is a challenging road climb offering steady gradients and spectacular views of the Riaño Mountains. From the summit, you can enjoy panoramic views of the surrounding valleys, reservoirs, and peaks.
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A very broken road. On a road bike, you're guaranteed to get a flat if you don't break something, both uphill and downhill. Great on gravel.
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It's a beautiful place and a dreamlike landscape. What a shame the shelter isn't working. These politicians we have don't do a single thing right.
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Caso offers a robust selection of touring cycling routes, with over two dozen options to explore. These routes traverse the stunning landscapes of the Redes Natural Park, providing diverse experiences for cyclists.
The touring cycling routes in Caso are predominantly challenging, with 21 routes rated as difficult. There are also a couple of moderate options available, but no easy routes are specifically listed for touring cycling. Expect significant elevation gains and varied terrain.
Cycling in Caso will immerse you in the breathtaking natural beauty of the Redes Natural Park, a UNESCO Biosphere Reserve. You'll experience glacial valleys, dramatic mountain peaks, and extensive forests dominated by ancient beech and oak trees. The Tarna Pass, where the River Nalón originates, adds to the picturesque environment, alongside features like the open esplanade of La Campona and the stunning Lake Ubales.
Yes, the region around Caso is known for its beautiful waterfalls. While some routes are more suited for walking, the Chorrón Waterfall is a notable highlight. The Ruta del Tabayón del Mongallu is celebrated for its majestic 60-meter Tabayón waterfall, and the Ruta del Desfiladero de los Arrudos features crystalline waterfalls along its path.
Yes, several routes in the area are designed as loops. For instance, the Collada de Arnicio Loop is a challenging 44.2 km route offering panoramic vistas. Another option is the Maraña Hostel – Maraña loop from Maraña, which is a moderate 18.7 km ride.
The touring cycling routes in Caso are highly rated by the komoot community, with an average score of 4.6 stars. Cyclists frequently praise the stunning natural landscapes, the challenging terrain that offers rewarding views, and the immersive experience within the Redes Natural Park. Many appreciate the panoramic vistas and the sense of adventure on these routes.
Absolutely. Beyond the natural beauty, you can encounter several points of interest. The routes often pass through or near significant mountain passes like the Tarna Pass and Alto de San Isidro. You might also discover natural monuments such as the Ojo de Buey (L'Arcu de la Finiesta), Peña Mea, or the dramatic Pendón River Gorges.
While most touring cycling routes in Caso are rated as difficult, there are a couple of moderate options available. The Maraña Hostel – Maraña loop from Maraña is a moderate 18.7 km route that offers a less strenuous experience while still allowing you to enjoy the region's beauty.
The Redes Natural Park, encompassing Caso, is particularly vibrant in autumn when the thick forests of beech and oak trees display stunning colors. While specific cycling conditions vary, spring and early autumn generally offer pleasant temperatures and beautiful scenery, making them ideal for touring cycling. Always check local weather conditions before heading out.
The River Nalón, the longest river in Asturias, originates at the Tarna pass within the Redes Natural Park. While specific touring cycling routes directly follow the river's entire course, its presence contributes significantly to the picturesque environment you'll experience on many rides in the area, particularly those around the Tarna Pass.
Yes, for those interested in reservoir views, the Maraña Hostel – Riaño Reservoir loop from Maraña is a difficult 59.9 km path that traverses diverse terrain and offers stunning natural landscapes, including vistas of the Riaño Reservoir.


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