4.7
(5)
64
riders
11
rides
Gravel biking around Guriezo offers a diverse natural environment, blending coastal charm with a mountainous interior. The landscape is characterized by the Agüera River valley, imposing rocky mountains, and extensive woodlands. An extensive network of quiet roads and country tracks provides varied terrain suitable for no traffic gravel bike trails, from river valleys to challenging mountain ascents.
Last updated: July 1, 2026
5.0
(3)
31
riders
56.2km
03:27
910m
910m
Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.
5.0
(1)
7
riders
50.5km
03:44
830m
830m
Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.

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4.0
(1)
7
riders
38.8km
02:53
890m
890m
Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.
5
riders
43.7km
03:41
1,070m
1,070m
Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.
5
riders
24.1km
02:21
730m
730m
Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.
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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.
1
0
Short and easy quiet route
0
0
An alternative climb to the road with a couple of challenging sections. The condition varies depending on the logging; by 2025, it's suitable for a gravel bike. On the way down, be careful of some water passages.
0
0
no kidding. 32 miles of this round trip of 40 miles was on gorgeous bike trails
0
0
Fast and very pleasant trail with very good sensations and fun
0
0
Classic local spot with stunning panoramic views
0
0
Guriezo offers a selection of 13 dedicated no-traffic gravel bike trails. These routes are designed to provide a serene cycling experience away from vehicular traffic, allowing you to fully immerse yourself in the region's natural beauty.
The terrain in Guriezo is remarkably varied, offering a blend of coastal paths, river valleys, and challenging mountain ascents. You'll find routes traversing lush forests, open meadows, and even wetlands. This diversity ensures a dynamic and engaging ride, whether you prefer rolling hills or more demanding climbs.
Yes, many of Guriezo's traffic-free gravel routes are rated as difficult, featuring significant elevation gains. For instance, the Valverde Tunnel – Alto de LA-1 (395 m) loop from Castro-Urdiales covers 43.7 km with over 1000 meters of ascent, providing a substantial challenge for experienced gravel bikers.
Guriezo's trails often lead through stunning natural landscapes. You can ride alongside the meandering Agüera River, explore dense woodlands, and even reach coastal areas near Oriñón beach. The region is also close to the Natural Park of the Santoña, Victoria and Joyel Marshes, offering unique opportunities for nature observation.
Absolutely. Many routes offer breathtaking vistas. The Devil's Eye viewpoint, a natural rock window, is a particularly awe-inspiring spot. You might also encounter the Hermitage of Our Lady of the Snows, perched on Pico de las Nieves, offering expansive views of the surrounding mountains and coastline.
The komoot community highly rates the gravel biking experience in Guriezo, with an average score of 4.7 stars. Reviewers often praise the region's diverse and captivating natural environment, the extensive network of quiet country tracks, and the stunning views from elevated points like Pico de las Nieves and Cerredo Mountain.
Yes, several circular routes are available, allowing you to start and end your ride in the same location. An example is the A & C Tunnel Entrance – El Sobaco Tunnel loop from Castaño auzunea, which offers a substantial 56.2 km ride through varied landscapes.
Yes, some routes are designed to connect Guriezo with nearby towns. For instance, the Alto de LA-1 (395 m) – Oriñón Bay loop from Castro-Urdiales provides a journey that links the Guriezo area with Castro-Urdiales, offering a broader exploration of the region.
Guriezo offers good conditions for gravel biking for much of the year. Spring and autumn generally provide pleasant temperatures and vibrant scenery. While the region is beautiful in summer, be mindful of warmer temperatures, especially on longer routes with significant climbs. Winter can be ridden, but some higher elevation paths might be more challenging due to weather conditions.
Beyond natural beauty, Guriezo's trails can lead you past points of cultural and historical interest. You might encounter traditional mountain houses, ancient Bronze Age caves like Llaguno, or historic churches and bridges. The ancient ironworks of La Yseca, surrounded by centenarian trees, also offers a scenic and historical stop.
One of the longer options is the A & C Tunnel Entrance – El Sobaco Tunnel loop from Castaño auzunea, which spans over 56 kilometers. This route provides an extensive journey through the region's diverse landscapes, perfect for a full day of riding.
Yes, some routes incorporate unique features like tunnels. The Puerto de Las Muñecas – Valverde Tunnel loop from Castro-Urdiales is an example, offering an interesting passage through the Valverde Tunnel as part of its course.


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