Best mountain passes around Riotuerto are found in Cantabria, a region nestled between the northern Cantabrian Sea coast and the Cantabrian Mountains. Riotuerto serves as a gateway to several notable passes in the surrounding Cantabrian Mountains. These passes offer diverse landscapes and opportunities for outdoor activities.
Last updated: July 1, 2026
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Uphill road with beautiful views and a quick descent towards Treto
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There is usually confusion between El Esquilo and Fuente las Varas, well, El Esquilo is a pass that we find at this point and that takes its name from the neighborhood belonging to the municipality of Voto that we have just passed through if we have started the ascent in the Arás Valley. After crowning it, we only have to finish the ascent to the crossroads called Puerto de Fuente las Varas through much softer terrain, where we can enjoy the views offered by the Matienzo poljé and the peaks of Asón that can already be glimpsed. Peña Rocias, Colina and Porracolina.
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The port has an altitude of 350 meters, a distance of 3.65 km and an average slope of 7%. The asphalt is in very good condition. The road runs next to wooded areas but the shadows are not very abundant. There are almost no cars.
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Mythical port in Cantabria with views that will surprise you. It is very enjoyable by bike, the road is in good condition and everything is well signposted. You go through very pretty towns.
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A port with 3 slopes, without a doubt one of my favorites in this area. Gateway to some of the best routes through Eastern Cantabria
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Mountain pass that connects the Miera and El Pisueña valleys, more specifically the towns of San Roque de Riomiera and Selaya. The two slopes of the port have spectacular views of the two valleys and their mountains, highlighting the Porracolina, the climb to Puerto de Lunada, the Picones de Sopeña and of course the great king of this entire area, the Castro Valnera.
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The mountain passes around Riotuerto offer a diverse range of natural landscapes. For instance, Collados del Asón is known for its unique karst landscapes, limestone outcrops, and beech and holm oak forests, shaped by glacial action. Other passes, like Portilla del Boquejón, showcase transitions from barren high-mountain scenery to lush vegetation and pastures.
Yes, several mountain passes near Riotuerto offer breathtaking views. Puerto de Alisas provides mythical views across Cantabria. From the top of Puerto de la Sía, you can enjoy spectacular vistas, especially towards the Cantabrian side. Alto del Caracol also offers impressive views of the Miera and El Pisueña valleys and their surrounding mountains.
Collados del Asón Natural Park is an excellent location for birdwatching. Species like Egyptian vultures, griffon vultures, and short-toed snake eagles are frequently sighted from accessible viewpoints such as Mirador de la Cascada del Asón.
Absolutely. Many mountain passes in the area are popular with cyclists. Puerto de la Sía is particularly well-known among cycle tourists, offering a challenging climb. Puerto de Alisas and Campo La Cruz also feature well-maintained roads suitable for cycling. You can find various cycling routes, including challenging road cycling tours, in the Road Cycling Routes around Riotuerto guide.
The region offers diverse hiking opportunities. Within Collados del Asón, you can explore various routes, including trails leading to the Brenarromán plateau. Portilla del Boquejón is a key point for hikers within the Picos de Europa National Park, offering transitions from high-mountain scenery to verdant forests. For more options, check the Running Trails around Riotuerto guide, which includes routes suitable for hiking.
Seasonal conditions can vary significantly. Puerto de la Sía, for example, is situated in one of Spain's colder regions and can frequently be closed by snow in winter or covered by fog. While it's worth visiting in both winter and summer, caution is advised, especially regarding weather and road conditions during colder months.
Yes, experienced cyclists will find challenges in the area. Puerto de la Sía is known for its challenging climb, with gradients reaching up to 10% and a length of over 20 km from Arredondo. Puerto de Alisas is another mythical pass in Cantabria that offers a rewarding cycling experience.
Yes, Collados del Asón is particularly notable for its unique karst landscapes, limestone outcrops, and features shaped by glacial action. Highlights include the spectacular Circo de Hondojón, the impressive Asón Waterfall, and the 700-meter-long Canal Honda canyon, carved by glaciers.
Visitors frequently appreciate the spectacular views, especially from passes like Puerto de Alisas and Alto del Caracol. The serene environment, lush greenery, and opportunities for outdoor activities like cycling and hiking are also highly valued. The well-maintained roads and clear signage on many passes contribute to an enjoyable experience.
Yes, La Matanela Pass, situated at 1,005 meters, marks a border between Burgos and Cantabria, and also between the Meseta and Pas regions, making it a point of interest for those exploring the region's geographical transitions.
Yes, an Interpretation Centre in La Gándara de Soba provides insights into the geomorphology, vegetation, fauna, and cultural aspects of Collados del Asón Natural Park. This is a great resource for understanding the area's unique characteristics.


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