4.7
(27)
303
riders
25
rides
Gravel biking around Muskiz offers a diverse landscape characterized by rolling hills, forested valleys, and proximity to the Cantabrian Sea. The region features a network of trails that traverse both inland and coastal areas, often utilizing old railway lines and rural tracks. Riders can expect varied terrain, including sections through tunnels and along scenic bays, providing a mix of challenging climbs and smoother paths.
Last updated: May 28, 2026
4.3
(3)
56
riders
72.6km
04:32
1,150m
1,150m
Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.
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.

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5.0
(4)
17
riders
31.3km
02:02
560m
560m
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.
8
riders
67.9km
05:04
1,300m
1,300m
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
Classic local spot with stunning panoramic views
0
0
Great cycling route to Bilbao or the coast
0
0
The detour to the mill and forge is a must 🤩
0
0
Gravel biking in Muskiz is primarily geared towards experienced riders. The majority of the routes, specifically 30 out of 36 available tours, are classified as difficult. There are 6 moderate routes, but no easy trails are listed, indicating a challenging terrain with significant elevation changes.
Given that most gravel bike trails in Muskiz are rated as difficult, and there are no easy routes, the area is generally not considered ideal for young families or beginners. Riders should be prepared for significant elevation gains and varied terrain. For a moderate challenge, you might consider exploring some of the 6 moderate routes available, but always check the specific tour details before heading out with family.
Muskiz offers a diverse landscape for gravel biking. You can expect a mix of rolling hills, dense forested valleys, and scenic coastal views along the Cantabrian Sea. Many routes utilize old railway lines, passing through historic tunnels, and offer expansive vistas over the landscape and bays. For example, the Alto de LA-1 (395 m) – Oriñón Bay loop from Castro-Urdiales provides coastal views and elevated viewpoints.
Yes, many of the gravel bike routes in Muskiz are designed as loops, allowing you to start and finish at the same point. Examples include the challenging El Sobaco Tunnel – A & C Tunnel Entrance loop from Putxeta and the A & C Tunnel Entrance – El Sobaco Tunnel loop from Castaño auzunea, both exploring tunnels and offering varied terrain.
The Muskiz area is rich with interesting sights. You can encounter historical structures like the Vizcaya Bridge or the Portugalete Transporter Bridge. Nature lovers might enjoy the La Arena Beach or explore the Greenway of the Montes del Hierro. There are also several lakes and reservoirs, such as Pozo Hostión and the Gorostiza Reservoir, offering scenic stops.
The gravel biking routes in Muskiz are highly regarded by the komoot community, boasting an average rating of 4.8 stars from over 10 reviews. More than 200 gravel bikers have used komoot to explore the region, often praising the varied terrain, the mix of forested hills, historic tunnels, and the scenic bay views.
Given the challenging nature of many routes, it's advisable to bring appropriate gear. This includes a well-maintained gravel bike, a helmet, sufficient water and snacks, a repair kit, and navigation tools. Due to the varied terrain and potential for significant elevation changes, layers of clothing are recommended to adapt to changing weather conditions, especially if you plan to explore routes like the El Sobaco Tunnel – Lago de Galdames loop from Muskiz.
While specific 'hidden gems' are often discovered through local exploration, the region's network of trails offers many opportunities to venture off the most popular paths. Routes that delve deeper into the forested valleys or connect to smaller villages might offer a more secluded experience. Exploring the areas around the Lakes of the Old Iron Mines could reveal some quieter sections.
Muskiz, being close to the Cantabrian Sea, generally experiences mild weather. Spring and autumn often provide the most pleasant temperatures for gravel biking, with less extreme heat than summer and fewer chances of heavy winter rains. However, the varied terrain means conditions can change, so always check the local weather forecast before your ride.
While specific cafes directly on the trails are not detailed, the routes often pass near or through small towns and villages where you can find local establishments to refuel. It's always a good idea to carry enough snacks and water, especially on longer, more remote routes like the Puerto de Las Muñecas – Valverde Tunnel loop from Castro-Urdiales, and plan your stops in advance.
There are over 35 gravel bike trails available in the Muskiz area, offering a wide range of options for riders looking to explore the region's diverse landscapes.


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