4.7
(46)
942
riders
100
rides
Mountain biking around Guernika-Bermeo offers diverse landscapes within the Urdaibai Biosphere Reserve. The region features rolling green hills, rugged coastlines, and lush forests, providing varied terrain for mountain bikers. This natural setting includes gentle mountains, oak and pine forests, and dramatic cliffs along the coast. The Mundaka estuary also contributes unique estuarine landscapes to the area.
Last updated: April 24, 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
20.0km
02:05
600m
600m
Moderate mountain bike ride. 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.
4.6
(5)
41
riders
30.0km
02:34
730m
730m
Moderate mountain bike ride. Good fitness required. Suitable for all skill levels.
35
riders
18.0km
01:47
560m
560m
Moderate mountain bike ride. Good fitness required. Suitable for all skill levels.
4.0
(1)
33
riders
14.5km
01:18
400m
400m
Moderate mountain bike ride. Good fitness required. Suitable for all skill levels.
4.8
(4)
27
riders
36.5km
03:02
890m
890m
Moderate mountain bike ride. Good fitness required. Suitable for all skill levels.
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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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Interesting prehistoric burial mounds with a view
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Picturesque old town with a relaxed surfer vibe
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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!
4
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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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The legend that attributes the name of Mundaca to the Latin expression munda aqua (clean water). This legend appears in the Chronicle of Vizcaya written by Lope García de Salazar in the 15th century. According to this story, a ship from Scotland arrived on the coast of Mundaca carrying a princess who had been banished from her land. The Scots called the place Munda aqua in their Latin language (sic) since they found a very clean source of water that contrasted with the murky waters of the Urdaibai estuary.
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Guernika-Bermeo offers a wide selection of mountain bike trails, with over 100 routes available. These trails cater to various skill levels, from moderate to difficult, allowing riders to explore the diverse landscapes of the Urdaibai Biosphere Reserve.
While many trails in Guernika-Bermeo are moderate to difficult, there are a few easier options available. The region's estuarine landscapes, particularly around the Mundaka Estuary, provide flatter, scenic routes that can be ideal for families or those seeking a less strenuous ride. You can find 3 easy trails and 67 moderate trails in the area.
Mountain biking in Guernika-Bermeo offers incredibly diverse landscapes within the Urdaibai Biosphere Reserve. You'll encounter rolling green hills, dense oak, beech, and pine forests, rugged coastlines with dramatic cliffs, and the unique estuarine environment of the Mundaka estuary. Trails often provide panoramic views from elevated points like the Sollube Massif or Mount Oiz.
Yes, many mountain bike routes in Guernika-Bermeo are circular, offering convenient starting and ending points. For example, the Katillotxu a Matxitxako – circular por Vista de San Juan de Gaztelugatxe desde Bermeo is a popular circular trail that provides coastal views. Another option is the Centro BTT Urdaibai Ruta 4 – circular desed Mendata, which is a challenging circular route.
The region is rich in scenic spots. You can ride towards the Matxitxako Lighthouse for stunning coastal views. The Views over the Urdaibai marsh offer a unique perspective of the estuary. For challenging rides with panoramic vistas, consider routes around the Sollube Massif or Mount Oiz. The View from San Pedro de Atxarre also provides some of the best views of the Urdaibai Biosphere Reserve.
Yes, you can combine your ride with visits to historical and cultural sites. The iconic Saint John of Gaztelugatxe, a rocky islet with its hermitage, is often part of tours in the Bermeo and Mundaka areas. Routes towards the Sollube summit from Bermeo can pass by sites like the Roman Necropolis of Tribisburu, and the Katillotxu Mountain Range features dolmen sites.
The mountain bike trails in Guernika-Bermeo are highly rated by the komoot community, with an average score of 4.6 stars from over 50 reviews. Riders frequently praise the diverse terrain, from coastal paths to dense forests, and the challenging yet rewarding climbs that offer spectacular views of the Urdaibai Biosphere Reserve.
The Urdaibai Biosphere Reserve has various towns and villages that may offer public transport connections. While specific public transport access points for each trail vary, towns like Gernika-Lumo and Bermeo are central hubs. It's advisable to check local bus or train schedules to see which routes align with your chosen trailheads.
Experienced riders will find plenty of challenging options. The Centro BTT Urdaibai Ruta 8 – Reserva de la Biosfera de Urdaibai is a difficult 29.1-mile path with significant elevation gain, exploring the heart of the reserve. Another demanding route is Monte Oiz – circular from Albiz, which features challenging climbs and panoramic views from the summit.
Guernika-Bermeo offers good mountain biking conditions for much of the year due to its mild climate. Spring and autumn generally provide pleasant temperatures and lush scenery, making them ideal. Summer can also be great, especially for coastal routes, but be mindful of warmer temperatures. Winter rides are possible, though some higher elevation trails might be more challenging due to weather conditions.
Absolutely, the Urdaibai Biosphere Reserve is central to mountain biking in the region. Many routes, such as the challenging Centro BTT Urdaibai Ruta 8, are specifically designed to explore its diverse landscapes, including gentle mountains, forests, and the unique estuarine environment. You'll experience the rich biodiversity and varied geography that makes this UNESCO-declared natural paradise so special.
Yes, the rugged coastline is a prominent feature of the region, and several mountain bike routes offer spectacular sea views. The Katillotxu a Matxitxako – circular por Vista de San Juan de Gaztelugatxe desde Bermeo is a prime example, providing coastal vistas and passing near the iconic San Juan de Gaztelugatxe. The Matxitxako Cape area also integrates into several routes, offering stunning ocean panoramas.


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