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Gravel rides
Spain
Santander
Cantabria

Ason

The best gravel rides around Ason

4.9

(8)

125

riders

7

rides

Gravel bike trails around Ason are characterized by challenging terrain with significant elevation gains, suitable for experienced riders. The region features routes that traverse varied landscapes, including areas with tunnels, natural rock formations, and mountain passes. These trails often connect different towns, offering extended rides through diverse environments.

Best gravel bike trails around Ason

  • The most popular gravel bike trail is A & C Tunnel Entrance – El Sobaco Tunnel loop from Castaño auzunea, a 34.9 miles (56.2 km)…

Last updated: June 28, 2026

5.0

(3)

31

riders

#1.

A & C Tunnel Entrance – El Sobaco Tunnel loop from Castaño auzunea

56.2km

03:27

910m

910m

Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.

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Hard

Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.

Hard
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Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.

Hard

Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.

Hard

Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.

Hard

Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.

Hard

Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.

Hard

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Popular around Ason

Cycle between land and sea in northern Spain – Pedales de Cantabria

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Cycle between land and sea in northern Spain – Pedales de Cantabria

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Tips from the Community

Stefan
June 14, 2026, Puerto de Hoyo Menor

Pass road in perfect condition. 7km constant climb from 40 to 340m pass height. The descent is also a dream.

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Bridge on the cycle superhighway over the motorway junction, for cyclists and pedestrians

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ChTh
October 4, 2025, El Sobaco Tunnel

Already pretty much at the end/beginning of the railway line, here it is even asphalted, before/later not anymore, but always easy to ride.

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The Torre de los Baranda, in Espinosa de los Monteros, is a stately building that reflects the historical importance of the area's lineages.

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Short and easy quiet route

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Ideal for taking a dip on hot days!

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The Hermitage of San Bernabé is located at the main entrance to the Ojo Guareña Karst Complex and is part of the caves. It is located in the municipality of Cueva de Sotoscueva. The date of its construction is unknown; some place it between the 8th and 9th centuries, but it is also believed to date back to the 13th century. It was originally dedicated to San Tirso.

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Nice bike gravel path!

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Frequently Asked Questions

Are the gravel bike trails around Ason suitable for beginners?

The gravel biking routes in Ason are generally considered challenging, featuring significant elevation gains and varied terrain. All 5 of the listed routes are rated as 'difficult'. Riders should have prior experience with gravel biking and be prepared for demanding climbs and long distances. For example, the A & C Tunnel Entrance – El Sobaco Tunnel loop from Castaño auzunea involves over 2,979 feet (908 meters) of ascent.

What kind of terrain can I expect on gravel bike trails in Ason?

Gravel bike trails in Ason are characterized by diverse and challenging terrain. You can expect routes that traverse varied landscapes, including areas with tunnels, natural rock formations, and mountain passes. The trails often connect different towns, offering extended rides through environments that demand good bike handling skills and endurance.

Are there any notable natural landmarks or viewpoints along the gravel routes in Ason?

Yes, Ason offers several natural landmarks and viewpoints that can be explored. Notable attractions include the stunning Asón Waterfall, the impressive Cullalvera Cave, and scenic spots like Alto de la Posadía and Covalruyo Viewpoint. Some routes, like the Natural Rock Arch of Puentedey – Puentedey loop from Espinosa de los Monteros, specifically lead through areas with unique natural rock arches.

What is the typical distance and duration for gravel bike routes in Ason?

The gravel bike routes in Ason are designed for longer, more adventurous rides. Distances typically range from approximately 27 miles (44 km) to nearly 49 miles (79 km). For example, the Alto de Guriezo – Menhir Yelso de Hayas loop from Marrón is about 27 miles (44 km) and takes around 2 hours 37 minutes, while the A & C Tunnel Entrance – El Sobaco Tunnel loop from Balmaseda covers 48.9 miles (78.7 km) and can take about 4 hours 37 minutes.

Are there any circular gravel bike routes in Ason?

Yes, many of the gravel bike routes in Ason are designed as loops, offering a convenient way to start and end your ride at the same point. Examples include the A & C Tunnel Entrance – El Sobaco Tunnel loop from Castaño auzunea, the Natural Rock Arch of Puentedey – Puentedey loop from Espinosa de los Monteros, and the La Sía Pass – Picón Blanco loop from Espinosa de los Monteros.

What do other gravel bikers enjoy the most about gravel biking in Ason?

The gravel biking experience in Ason is highly rated by the komoot community, with an average score of 4.9 stars from 8 reviews. Riders often praise the challenging climbs, the varied terrain including tunnels and natural rock formations, and the opportunity to explore routes that connect different towns. The adventurous and demanding nature of the trails is a significant draw for experienced riders.

Are the gravel bike trails in Ason family-friendly or dog-friendly?

Given the challenging nature of the gravel bike trails in Ason, which feature significant elevation gains and are rated as 'difficult', they are generally not recommended for young families or casual rides with dogs. These routes are better suited for experienced riders seeking a demanding adventure. Always consider the specific needs and abilities of your family members or pets before attempting any trail.

What is the best time of year for gravel biking in Ason?

While specific seasonal recommendations for Ason are not detailed, regions with challenging terrain and mountain passes often offer the best gravel biking conditions during spring, summer, and early autumn. These seasons typically provide more stable weather, longer daylight hours, and clearer trails. Winter conditions, especially at higher elevations or in areas with tunnels, could introduce snow, ice, or colder temperatures, making routes more difficult or impassable.

Are there any cafes or accommodation options near the gravel bike trails in Ason?

The routes in Ason often connect different towns, which typically means you can find local amenities such as cafes, restaurants, and accommodation options in these settlements. While specific establishments are not listed, planning your route to pass through or end in towns like Castaño auzunea, Balmaseda, Espinosa de los Monteros, or Marrón would likely provide opportunities for refreshments and lodging.

How many gravel bike trails are available in Ason?

There are 5 distinct gravel bike trails listed for the Ason region. These routes are all categorized as difficult, offering challenging experiences for seasoned gravel bikers.

What are the elevation gains like on Ason's gravel routes?

The gravel routes in Ason are known for significant elevation gains, making them quite challenging. For instance, the Natural Rock Arch of Puentedey – Puentedey loop from Espinosa de los Monteros features over 1,511 meters (4,957 feet) of ascent, and the A & C Tunnel Entrance – El Sobaco Tunnel loop from Balmaseda includes more than 1,015 meters (3,332 feet) of climbing.

Where can I find parking or trailheads for gravel biking in Ason?

The gravel routes in Ason typically start from towns or specific points within the region. For example, routes like the A & C Tunnel Entrance – El Sobaco Tunnel loop can be accessed from Castaño auzunea or Balmaseda, while others start from Espinosa de los Monteros or Marrón. These towns usually offer public parking facilities, but it's advisable to check local regulations or specific trailhead information for each route before your ride.

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