4.6
(45)
928
riders
95
rides
Mountain biking around Urdaibai offers diverse terrain across a UNESCO Biosphere Reserve, characterized by low mountains, steep slopes, and the Cantabrian Sea. The region features a vast estuary system, extensive holm oak and pine forests, and a coastline with cliffs and coves. This combination provides a range of riding experiences, from paths along wetlands to trails with significant elevation gains through woodlands.
Last updated: May 10, 2026
4.5
(2)
44
riders
Hard mountain bike ride. Very good fitness required. Suitable for all skill levels.
5.0
(1)
14
riders
46.8km
04:32
1,590m
1,590m
Hard mountain bike ride. Very good fitness required. Advanced riding skills necessary.

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7
riders
33.2km
03:03
990m
990m
Hard mountain bike ride. Very good fitness required. Suitable for all skill levels.
2
riders
19.0km
01:34
460m
470m
This moderate 11.8-mile mountain biking route in the Urdaibai Biosphere Reserve offers lush forests and scenic hills from Ajangiz.
3.0
(1)
2
riders
29.3km
03:04
1,020m
1,020m
Hard mountain bike ride. Very good fitness required. Suitable for all skill levels.
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Popular around Urdaibai
A beautiful vantage point. If the season is right, there's also the opportunity to watch whales. The path further to Gaztelugatxe, however, requires pushing because it's very overgrown. We didn't go far, but turned around and drove back along the road.
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Edwin, I've been drinking water from that spring for over 30 years. In fact, all of us in Berriz drink water from the springs in Oiz. I'd say it's some of the best water you can drink in the Basque Country, hehe.
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From the lighthouse you have a 270° view on the coast, very clear on st juan de Gaztelugatxe, perfect spot for some scenic pictures!
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Great view of the peninsula! In my opinion, you can save yourself the trip to the peninsula and the online registration process.
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This cape is the most prominent point in Euskadi, located very close to the famous hermitage of San Juan de Gaztelugatxe. If you bring binoculars, you can also occasionally spot cetaceans and seabirds. In addition, you will be able to see the current lighthouse as well as the old one, although only the tower remains of the old one.
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From here you will have splendid views of the famous hermitage and the winding path that leads to it.
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Located on the spectacular cliffs of Cape Matxitxako between the municipalities of Bermeo and Bakio, the lighthouse offers panoramic views of the Cantabrian Sea. It is also a historical place, as it was the scene of several shipwrecks in the past and has a monument in memory of the sailors who died at sea.
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There is a fountain here and the views are quite good of the valley below. I'm not sure if the water is drinkable. It probably is, but I'm not sure I'd risk it.
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There are nearly 100 mountain bike trails in Urdaibai, offering a wide range of experiences. This includes 3 easy routes, 65 moderate routes, and 30 difficult routes, catering to various skill levels.
Yes, Urdaibai offers several easy mountain bike trails perfect for beginners or those looking for a relaxed ride. These routes often follow the serene beauty of the estuary and wetlands. While specific easy routes are not detailed in the provided data, the region's diverse terrain includes accessible paths.
Urdaibai's mountain bike trails feature a highly varied terrain. You'll encounter low mountains, steep slopes, and paths along the Cantabrian Sea. The region is characterized by a vast estuary system, extensive holm oak and pine forests, and a coastline with cliffs and coves. This means you can expect everything from gentle rides along wetlands to challenging ascents through woodlands.
Yes, Urdaibai offers several longer routes for those seeking a more extensive ride. For example, the Centro BTT Urdaibai Ruta 8 – Reserva de la Biosfera de Urdaibai is a difficult 29.1-mile (46.8 km) path that traverses the heart of the Biosphere Reserve, showcasing its varied natural environment.
Advanced riders will find plenty of challenging options in Urdaibai. The Katillotxu a Matxitxako – circular por Vista de San Juan de Gaztelugatxe desde Bermeo is a difficult 20.5-mile (33.0 km) trail offering challenging riding with coastal views. Another demanding option is the Monte Oiz – circular from Albiz, which covers 29.3 miles (47.2 km) with significant elevation gain.
Yes, many mountain bike routes in Urdaibai are designed as loops, allowing you to start and end at the same point. An example is the Centro BTT Urdaibai Ruta 4 – circular desed Mendata, a 20.6-mile (33.2 km) trail leading through forests and hills.
Urdaibai, a UNESCO Biosphere Reserve, offers stunning natural attractions. You can ride past the vast Urdaibai Estuary and its wetlands, crucial for migratory birds. Trails also weave through extensive holm oak, beech, and pine forests. For breathtaking views, consider routes near viewpoints like Views over the Urdaibai marsh or View from San Pedro de Atxarre.
Beyond natural beauty, Urdaibai is rich in cultural and historical sites. You might encounter landmarks like the Matxitxako Lighthouse along coastal routes. The region is also home to the unique Oma Forest, an art installation where trees are painted with various motifs, integrating art into the natural landscape.
The area is highly rated by the komoot community, with an average score of 4.6 stars from over 50 reviews. Reviewers often praise the diverse terrain, which combines low mountains, estuary paths, and dense forests, offering options for different ability levels. The stunning views of the sea and the Mundaka estuary are also frequently highlighted.
Yes, Urdaibai offers options for family-friendly mountain biking, particularly along the easier routes that traverse the estuary and wetlands. These paths provide a gentler experience, allowing families to enjoy the natural beauty of the Biosphere Reserve together. It's advisable to check individual route descriptions for specific suitability for children.
Urdaibai's climate, influenced by the Cantabrian Sea, generally offers mild temperatures. Spring and autumn are often ideal for mountain biking, with pleasant weather and lush landscapes. Summers can be warm, especially inland, while winters are mild but can bring more rain. Always check local weather forecasts before heading out.
Yes, the Urdaibai region is dotted with traditional hamlets and historically significant towns. You can ride through or near charming villages like Mundaka, known for its picturesque old town and the Santa Catalina Hermitage, or Gernika-Lumo, offering cultural insights. These towns often provide opportunities for breaks and refreshments.
Yes, the region supports cycling through initiatives like the "Urdaibai Bike Reserve." This enhances the cycling experience by offering designed routes and services for various cycling disciplines, including mountain biking. Routes like Urdaibai BTT Center Route 2 are part of this network.


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