5.0
(2)
205
riders
36
rides
Gravel biking around Guernika-Bermeo offers diverse terrain within the Urdaibai Biosphere Reserve, characterized by its significant wetlands and varied ecosystems. The region features coastal routes with views of the Cantabrian Sea and the Urdaibai estuary, transitioning inland to lush mountains and green pastures. Riders can explore paths through beech and oak forests, encountering both challenging ascents and descents. The landscape also includes unique flysch formations along the coastline, providing a mix of natural features for gravel exploration.
Last updated: July 8, 2026
5.0
(1)
15
riders
22.1km
02:03
500m
500m
Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.
20
riders
22.1km
01:45
470m
470m
Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.

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8
riders
34.6km
02:50
820m
820m
Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.
19
riders
38.0km
02:38
610m
610m
Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.
14
riders
36.5km
03:14
880m
880m
Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.
22
riders
35.7km
02:24
560m
560m
Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.
6
riders
82.2km
06:18
2,020m
2,020m
Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.
12
riders
36.0km
03:13
940m
940m
Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.
12
riders
19.9km
01:52
570m
570m
Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.
12
riders
32.3km
02:34
550m
550m
Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.
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Popular around Guernika-Bermeo
Beautiful place, always with a lot of people. Ideal when the surroundings are foggy.
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The castle is gigantic and beautiful to look at, unfortunately it has been surrounded by a construction fence for ages. Unfortunately, you can't see much. Whether the detour is worth it, everyone has to decide for themselves.
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Beautiful views . A few minutes from the parking lots
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Beautiful place for all tastes For hiking, cycling, to bring children with a park with swings
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Besaide, an easily accessible place from Arrasate, Elorrio or Aramaiona, where the 3 Basque provinces meet, is a very emblematic place of Basque mountaineering, where on the third Sunday of September a commemorative act is celebrated in memory of all deceased mountaineers. We should have a little more awareness to preserve the clean environment.
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Small stone chapel with drinking water fountain in front
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Definitely a highlight, but unfortunately, the castle was covered in scaffolding when I visited. The castle dates back to the Middle Ages but was later almost completely rebuilt.
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The gravel bike trails in Gernika-Bermeo, located within the Urdaibai Biosphere Reserve, offer a diverse mix of terrain. You'll encounter coastal paths with views of the Cantabrian Sea and the Urdaibai estuary, lush mountain trails, green pastures, and paths winding through beech and oak forests. The region also features unique flysch formations along the coastline, providing varied surfaces for gravel exploration.
While many routes in the region are rated as difficult, there are options that cater to varying skill levels. The Urdaibai Biosphere Reserve offers a mix of terrain, and some routes combine mostly paved surfaces with unpaved sections, which can be more approachable. For a less strenuous journey, consider exploring sections of the GR 98 Tour of Urdaibai, which offers a flatter profile closer to the estuary.
Gravel biking in Gernika-Bermeo offers stunning natural beauty and historical landmarks. You can ride past the iconic Saint John of Gaztelugatxe, enjoy Views over the Urdaibai marsh, or explore the serene Oma Forest. Other notable sights include the Matxitxako Lighthouse and various viewpoints like View from San Pedro de Atxarre, offering panoramic vistas of the coast and mountains.
Gravel bike routes around Gernika-Bermeo vary significantly in length and elevation. You can find routes like the Bar del Vivero – Gentle Slope Trail loop from Biscay, which is about 22 km with nearly 500 meters of elevation gain. More challenging options, such as the Butrón Castle – View of the Jata Coast loop from Lezama, can extend over 80 km with more than 2000 meters of climbing, requiring very good fitness.
Yes, many gravel bike routes in the Gernika-Bermeo area are designed as loops, allowing you to start and finish at the same point. Examples include the La Nevera de Neberondo – Neverondo Ice House loop from Durango and the Argiñeta Necropolis loop from San Fausto. These circular routes offer diverse scenery and varied terrain.
The Urdaibai Biosphere Reserve generally offers pleasant conditions for gravel biking for much of the year. Spring and autumn typically provide mild temperatures and beautiful scenery, making them ideal. Summers can be warm, especially inland, while winters are generally mild but can bring rain. Always check the local weather forecast before heading out.
The Urdaibai Biosphere Reserve is a protected natural area. While many outdoor activities are permitted, specific regulations regarding dogs on trails can vary. It's advisable to keep dogs on a leash, especially in areas with wildlife or livestock, and to check local signage or official park guidelines for any restrictions on specific paths or during certain seasons.
Gernika-Bermeo is well-connected within the Basque Country. Public transport, including local buses and trains, can help you reach various starting points for gravel routes. Gernika-Lumo and Bermeo are key towns with transport links. It's recommended to check specific routes and schedules for bike carriage policies before planning your trip.
Parking is generally available in and around the main towns like Gernika-Lumo and Bermeo, as well as in smaller villages that serve as starting points for routes. Look for designated parking areas, especially near popular attractions or trail access points. Always ensure you park responsibly and respect local regulations.
Yes, the region is dotted with charming towns and villages where you can find cafes, restaurants, and traditional Basque 'pintxo' bars. Bermeo, Mundaka, and Gernika-Lumo offer numerous options for refreshments and meals. Many routes pass through or near these settlements, providing convenient stops to refuel during your ride.
Gravel biking in Gernika-Bermeo is unique due to its setting within the UNESCO Urdaibai Biosphere Reserve, offering an unparalleled blend of coastal beauty, lush mountains, and rich cultural heritage. The diverse terrain, from estuary views to ancient forests and historic sites like the Argiñeta Necropolis, provides a constantly changing and engaging backdrop for rides, combining adventure with natural and cultural immersion.
There are over 35 gravel bike trails documented in the Gernika-Bermeo area on komoot, offering a wide range of options for riders. These routes vary in length, difficulty, and scenery, ensuring there's something for every gravel biking enthusiast.


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