4.7
(18)
443
riders
32
rides
Mountain biking around Molledo offers a diverse landscape characterized by river valleys, rolling hills, and the scenic Alsa Reservoir. The region features a network of trails that traverse varied terrain, including historical paths and rural tracks. Mountain bikers can expect routes that wind through natural areas, providing both challenging climbs and enjoyable descents.
Last updated: July 17, 2026
39
riders
48.0km
05:06
1,620m
1,620m
Hard mountain bike ride. Very good fitness required. Advanced riding skills necessary.
21
riders
Moderate mountain bike ride. Good fitness required. Advanced riding skills necessary.

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11
riders
48.2km
04:36
1,430m
1,430m
Hard mountain bike ride. Very good fitness required. Suitable for all skill levels.
4.0
(1)
82
riders
54.6km
05:52
1,840m
1,840m
Hard mountain bike ride. Very good fitness required. Advanced riding skills necessary.
12
riders
Moderate mountain bike ride. Good fitness required. Advanced riding skills necessary.
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Located in the La Serna de Iguña neighborhood, in this chapel dedicated to Saint Anthony Abbot, the Octave of Corpus Christi is celebrated. The neighborhoods that make up La Serna are Corral Mayor, Corral de Abajo, Pilipapo or Ribero, and Elecha or Helecha. There is a place known as San Vitores which denotes its previous religious dedication to the aforementioned Saint.
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The San Andrés Bridge is in Somahoz (Los Corrales de Buelna) over the Besaya River, which gives access to the San Andrés neighbourhood. It is divided into a narrow lane for vehicles and a pedestrian crossing, and from it we see a railway bridge that we have to go under to enter the neighbourhood. And that railway bridge (or overpass) that we crossed is part of the historic "Ferro-carril de Isabel II" (Isabel II Railway) that began to be built in the mid-19th century with the project of joining the towns of Alar del Rey with Santander and whose section from Bárcena de Pie de Concha to the Cantabrian capital must have been finished in 1858.
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At the beginning of the San Andrés neighbourhood, in Somahoz, the views upstream from the Besaya are beautiful. This is the starting point for several routes.
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the views over Cantabria and the north of burgos are worth the effort to go up on foot or by bike
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The Roman road known as Calzada de los Blendios connected Pisoraca (Herrera de Pisuerga, in Palencia) and Portus Blendium (Suances, in Cantabria). It was the main means of communication between the Castilian plateau and the Cantabrian coast. It runs through a mountain area and is covered by oak, chestnut and beech groves.
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The church of San Jorge, popularly known as El Partenón, is a few meters from the Palacio de los Hornillos. Built in 1890 as a chapel near his palace, it was donated by the dukes to the town of Las Fraguas to serve as a parish church. It was used during the Civil War as a prison. It is a purely neoclassical building.
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The Palacio de los Hornillos or Palacio de las Fraguas is a large estate in which two palaces are located. The oldest called Casona de las Fraguas (from the 18th century) and the largest of both, called de los Hornillos (late 19th century). It has been the setting for several movies. The Palace of the Hornillos is a private property, owned by the Duke of San Carlos, and cannot be visited. La Casona de las Fraguas is currently a catering business that organizes banquets and celebrations.
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The pre-Roman stelae of Barros and Lombera stand out, as well as the manor houses that can be found in the Rasilla park area, such as the palace of the Counts of Mansilla, Bustamante and Quijano. One of the main attractions are the Cantabrian Wars festivities, which are held on the last weekend of August and the first of September, recreating the wars between the Romans and the Cantabrians.
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Molledo offers a good mix of challenges for mountain bikers. Out of 33 available routes, you'll find 12 moderate trails and 21 difficult trails. There are currently no easy routes listed, so riders should be prepared for some climbs and technical sections.
While Molledo's trails tend to lean towards moderate and difficult ratings, some of the moderate routes might be suitable for families with older, experienced children. For example, the Río Besaya – Torre de Cobejo loop from Santa Cruz de Iguña is a moderate 21.4-mile path that follows the scenic Río Besaya valley, offering a less strenuous option compared to the more challenging routes.
The terrain around Molledo is quite varied, characterized by river valleys, rolling hills, and circuits around the scenic Alsa Reservoir. You'll encounter historical paths and rural tracks, with routes winding through natural areas that provide both challenging climbs and enjoyable descents.
Yes, many of the mountain bike routes in Molledo are designed as loops, allowing you to start and finish in the same location. Popular circular options include the Palacio de los Hornillos – Alsa Reservoir loop from Santa Cruz de Iguña, the Alsa Reservoir – Roman Road Trail loop from Molledo Portolín, and the Alsa Reservoir – Casares Village loop from Bárcena.
The mountain bike trails in Molledo are highly rated by the komoot community, with an average score of 4.8 stars from over 15 reviews. Riders often praise the diverse landscape, the extensive views, and the combination of reservoir circuits with historical pathways.
Absolutely. The region offers several scenic spots. You can find stunning views from various peaks and passes. Notable viewpoints include the View of Pico Tordias and the El Moral Plateau. Many routes, such as those around the Alsa Reservoir, also offer picturesque vistas.
For experienced riders seeking a challenge, Molledo has several difficult routes. The Alsa Reservoir – Roman Road Trail loop from Molledo Portolín is a demanding 33.4-mile trail that typically takes nearly 5 hours to complete, featuring significant elevation changes. Another difficult option is the Palacio de los Hornillos – Alsa Reservoir loop from Santa Cruz de Iguña, which covers 28 miles with extensive views.
Yes, Molledo offers 12 moderate mountain bike trails perfect for intermediate riders. A great option is the Río Besaya – Torre de Cobejo loop from Santa Cruz de Iguña, a 21.4-mile route that combines riverside sections with climbs to historical points. Another moderate choice is the Los Corrales de Buelna – Palacio de los Hornillos loop from Molledo Portolín.
Molledo's trails often incorporate historical elements. Routes like the Alsa Reservoir – Roman Road Trail loop from Molledo Portolín lead you along ancient pathways. You might also pass by historical structures or points of interest such as the Palacio de los Hornillos, which is featured in the Palacio de los Hornillos – Alsa Reservoir loop from Santa Cruz de Iguña.
There are over 30 mountain bike trails available around Molledo, offering a wide range of options for different skill levels and preferences. Specifically, komoot lists 33 distinct mountain bike tours in the area.
The Molledo region is surrounded by several notable peaks and mountain passes that can be seen or reached from various trails. These include summits like La Garita Collado Summit, La Coronilla, and Pico Jano. Mountain passes such as Alto de la Matanela and Collada de Brenes also offer challenging climbs and rewarding views.


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