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Routes
Road cycling routes
Spain
Santander
Cantabria
Ason

National Park los Collados del Asón

Routes
Road cycling routes
Spain
Santander
Cantabria
Ason

National Park los Collados del Asón

The best road cycling routes around National Park los Collados del Asón

4.8

(15)

1,631

riders

18

rides

Road cycling routes around National Park los Collados del Asón traverse the Cantabrian Mountains, offering varied terrain from 240 to over 1,500 meters in altitude. The landscape features a blend of glacial and karstic formations, including limestone outcrops and river valleys. Cyclists encounter challenging climbs and scenic roads, such as those leading through mountainous passes and natural viewpoints. The park's relatively unpopulated nature ensures tranquil routes amidst diverse ecosystems.

Best road cycling routes around National Park los Collados del Asón

Last updated: July 12, 2026

72

riders

#1.

Portillo Lunada – La Sía Pass loop from Collado del Asón

151km

09:38

4,190m

4,190m

Hard road ride. Very good fitness required. Mostly well-paved surfaces and easy to ride.

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Hard

Moderate road ride. Good fitness required. Mostly well-paved surfaces and easy to ride.

Moderate
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Hard road ride. Very good fitness required. Mostly well-paved surfaces and easy to ride.

Hard

Hard road ride. Very good fitness required. Mostly well-paved surfaces and easy to ride.

Hard

Hard road ride. Very good fitness required. Mostly well-paved surfaces and easy to ride.

Hard
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Tips from the Community

Tobías Fleitas
May 24, 2026, Ampuero Climb

It is a good hike to get to know two small but very beautiful villages with very friendly people

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A demanding but VERY beautiful route. The Estacas de Trueba pass is absolutely spectacular!

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nabartu
September 8, 2024, Portillo de La Sía

very windy, wrap up well

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Douglas Beer Craft beers Made in Cantabria since 2006 Think Global, Drink Local From Liérganes with love

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It is 1.5 km from the top of the port.

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Meters before reaching the Port or Portillo de la Sía, at 1,200 m. altitude, we find the Mirador, from where we have impressive views of the Soba Valley.

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The Carlos III Gate is located in the town of Riotuerto. If you're in the area, stop by this baroque memorial arch.

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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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Frequently Asked Questions

What kind of terrain can I expect on road cycling routes in National Park Los Collados del Asón?

The National Park Los Collados del Asón offers a diverse road cycling experience, characterized by the Cantabrian Mountains. You'll encounter varied terrain with altitudes ranging from 240 to over 1,500 meters, featuring challenging ascents, winding roads, and scenic passes. The landscape is shaped by glacial and karstic formations, including limestone outcrops and river valleys, providing a visually stunning backdrop for your rides.

Are there challenging climbs for experienced road cyclists in the park?

Yes, the park is renowned for its challenging climbs. Notable ascents include Collado Espina, sometimes referred to as Los Machucos, known for its steep gradients and inclusion in the Vuelta a España. Another significant climb is Collado del Asón, averaging a 4.9% gradient over 10.8 kilometers, with a total ascent of 521 meters. These climbs offer demanding routes with rewarding panoramic views.

How many road cycling routes are available in National Park Los Collados del Asón?

There are 18 road cycling routes available in National Park Los Collados del Asón. These routes cater to various skill levels, with 1 easy route, 4 moderate routes, and 13 difficult routes, ensuring options for every cyclist.

What are some scenic landmarks or viewpoints to look out for while cycling?

The park is rich in natural beauty and offers several scenic landmarks. You can cycle past the impressive La Sía Pass, enjoy views from Alto de la Posadía, or witness the spectacular Asón Waterfall, which emerges directly from the limestone rock. The glacial Circo de Hondojón also offers impressive views, and roads like the CA-265 provide natural viewpoints throughout the mountainous passes.

Are there any easy road cycling routes suitable for beginners or a more relaxed ride?

Yes, there is an easy route available. The Picnic Area by the Asón River – Ramales de la Victoria loop from Arredondo is an easy 17.8-mile (28.6 km) path that follows the Asón River valley, offering a peaceful ride through natural surroundings. This route is ideal for those seeking a less strenuous experience.

What do other road cyclists say about their experience in National Park Los Collados del Asón?

The road cycling routes in National Park Los Collados del Asón are highly rated by the komoot community, with an average score of 4.75 stars from 14 reviews. Cyclists often praise the challenging mountain passes, the breathtaking glacial and karstic landscapes, and the tranquil, low-traffic roads that allow for an immersive cycling experience amidst stunning natural beauty.

Can I find loop routes for road cycling in the park?

Yes, many of the routes in National Park Los Collados del Asón are designed as loops, allowing you to start and finish at the same point. Examples include the popular Portillo Lunada – La Sía Pass loop from Collado del Asón and the La Sía Pass – La Gándara Viewpoint loop from Soba, providing convenient circular journeys.

What is the best time of year to go road cycling in National Park Los Collados del Asón?

The park's mountainous terrain means that spring, summer, and early autumn generally offer the most favorable conditions for road cycling. During these seasons, you can expect milder weather and clearer roads, allowing for better enjoyment of the challenging climbs and scenic views. Always check local weather forecasts before heading out, especially for higher elevations.

Are there any specific natural features that make this region unique for road cycling?

Absolutely. The region is unique due to its blend of Quaternary glacial action and ongoing karstic processes. This has created distinctive features such as the spectacular Circo de Hondojón, one of the best-preserved glacial cirques in the Cantabrian Mountains, and numerous limestone outcrops. The Asón River, with its impressive waterfall source, also adds to the dramatic and visually stunning landscape that cyclists can explore.

Are there any moderate difficulty road cycling routes available?

Yes, there are 4 moderate difficulty road cycling routes. One such route is the La Sía Pass – La Gándara Viewpoint loop from Soba, a 13.3-mile (21.4 km) trail that leads through mountainous passes and can typically be completed in about 1 hour 26 minutes, offering a good balance of challenge and accessibility.

What kind of natural environment will I experience while cycling in the park?

You will experience a diverse and tranquil natural environment. The park boasts a variety of ecosystems, including small beech forests, Cantabrian holm oak groves, and meadows used for livestock. The relatively unpopulated nature of the area ensures a high degree of natural preservation and tranquility, allowing cyclists to enjoy the scenery with minimal traffic and a strong sense of immersion in nature.

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