16
riders
4
rides
Gravel biking around Busturia offers diverse terrain within the UNESCO Urdaibai Biosphere Reserve. The region features a mix of estuary marshlands, rolling green hills, and dense forests. Coastal paths provide views of the Cantabrian Sea, while inland routes navigate an undulating relief with varied elevations. This landscape provides a range of no traffic gravel bike trails suitable for different skill levels.
Last updated: May 4, 2026
2
riders
15.5km
01:28
490m
480m
Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.
3
riders
48.1km
04:03
1,390m
1,390m
Hard gravel ride. Very good fitness required. You may need to push your bike for some segments of this route.

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2
riders
30.3km
02:43
870m
870m
Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.
3
riders
23.8km
01:47
560m
550m
Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.
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Super beautiful views over the coast
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on your way down don't miss a small path to the right. this leads you to a view onto Gatzelugatxe
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Great viewpoint over the bay, beach and swimmers. There are also benches here
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There are always great views from the street
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A low point on the tour. It was a Sunday and all the restaurants were packed. When I politely expressed my wish to be able to charge the battery in Spanish, we were literally thrown out. Spaniards drive long distances to eat out on Sundays. It has never happened to us that the battery was not allowed to be charged. Of course we would have eaten and drank. The whole place was almost entirely made up of holiday apartments, with the blinds down and totally dead without the lunch guests. No hotel, no guesthouse, but with a train station. Cheers to the Euskotren regional train in the Basque Country, on time, super helpful staff. So take the train back to Gernica!!!
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Completely destroyed by the German Condor Legion in the Spanish Civil War. https://de.wikipedia.org/wiki/Luftkampf_auf_Guernica A well-worth seeing exhibition in the central square shows the horrors of the civil war. The Spanish spelling with "ue" probably goes back to Picasso.
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Wall reproduction of Picasso's painting "Guernica" exhibited at the Reina Sofía Museum in Paris.
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There are currently 4 challenging no-traffic gravel bike trails around Busturia featured in this guide. These routes offer a fantastic way to explore the diverse landscapes of the Urdaibai Biosphere Reserve away from vehicle traffic.
The terrain in Busturia and the wider Urdaibai Biosphere Reserve is wonderfully varied. You'll encounter everything from flat or gently undulating paths along the estuary and marshlands to rolling hills, valleys, and forests. Expect a mix of unpaved roads, mule tracks, and some ascents, providing a diverse and engaging gravel biking experience.
While the routes listed in this guide are rated as 'difficult' due to their elevation gain and distance, the region does offer gentler paths, particularly along the Urdaibai Estuary. For families, consider exploring the flatter sections near the marshlands or the accessible areas around San Antonio beach, which provide a more relaxed environment away from traffic. Always check the route details for specific difficulty and elevation before heading out with children.
Many routes offer stunning natural and cultural sights. You could pass by the unique Oma Forest with its painted trees, or enjoy panoramic vistas from viewpoints overlooking the Urdaibai marsh. The Guernica Mural in Gernika – Artzubi Bridge loop from Gernika, for example, takes you past the significant Guernica Mural and the historic Artzubi Bridge.
Yes, all the no-traffic gravel routes in this guide are circular, allowing you to start and end at the same point. For instance, the Fantastic view from the top – Viewpoint Bakio Bay loop from Bakio and the Bermeo Harbor – Bermeo Harbour loop from Bermeo are excellent examples of circular tours that let you explore the region's beauty.
Busturia benefits from an oceanic climate, making it suitable for gravel biking for much of the year. Spring and autumn generally offer pleasant temperatures and lush landscapes, ideal for exploring. Summer can be warm but is also popular, especially along the coast. Winter rides are possible, but be prepared for cooler, potentially wetter conditions, especially in forested areas.
Busturia and nearby towns like Mundaka and Gernika are generally well-connected by local public transport, including trains, which can be convenient for cyclists. Many routes start from towns or villages, making them accessible. It's advisable to check specific public transport schedules and bicycle carriage policies for the exact route you plan to undertake.
Parking is typically available in the towns and villages where these routes begin. For example, if you're starting the View of the Jata Coast – View of Bakio loop from Mungia, you'd look for parking options in Mungia. Similarly, routes starting from Bakio, Gernika, or Bermeo will have parking facilities within those locations. Always check local signage for parking regulations.
The longer routes, such as the View of the Jata Coast – View of Bakio loop from Mungia, often reward riders with expansive vistas. You can expect stunning coastal views of the Cantabrian Sea, dramatic cliffs, and panoramic outlooks over the green hills and valleys of the Urdaibai Biosphere Reserve. Keep an eye out for highlights like the Matxitxako Lighthouse.
Absolutely. The region is rich in cultural heritage. Routes often pass through charming villages, allowing you to experience local culture. You might encounter historical sites like the Madariaga Tower, the Church of Santa María de Axpe, or the Chirapozu Palace. The Guernica Mural in Gernika – Artzubi Bridge loop from Gernika is a prime example, taking you through Gernika, a town with deep historical significance.
The Urdaibai Biosphere Reserve is exceptional for gravel biking due to its protected status and incredible biodiversity. It offers a unique blend of landscapes, from the serene estuary and marshlands perfect for birdwatching to lush green hills and coastal paths with breathtaking sea views. The commitment to sustainable tourism ensures a pristine environment, making every ride a truly immersive natural experience away from heavy traffic.


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