4.8
(86)
647
riders
95
rides
Mountain biking around Nabarniz, located within the Urdaibai Biosphere Reserve in Bizkaia, Spain, offers diverse natural landscapes and an extensive network of trails. The region features varied terrains, including high valleys, mountains, and lush indigenous forests like the Oma and Basondo Holm Oak Woods. Mount Illuntzar, a prominent peak at over 700 meters, provides significant elevation gains and panoramic views of the reserve. These features create dynamic and engaging experiences for mountain bikers, from forested singletracks to open paths with…
Last updated: May 20, 2026
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.

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2
riders
19.0km
01:34
460m
470m
Moderate mountain bike ride. Good fitness required. Suitable for all skill levels.
5.0
(1)
13
riders
10.8km
01:20
500m
500m
Moderate mountain bike ride. Good fitness required. Suitable for all skill levels.
10
riders
19.2km
01:39
400m
400m
Moderate mountain bike ride. Good fitness required. Suitable for all skill levels.
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Lonely coastal road for cycling with a beautiful beach and bars for a break.
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Basilica of Our Lady of the Assumption of Lekeitio (Gothic style).
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This bridge is an incredible find in the middle of the forest. It is covered with ivy and in summer it is so green that it is hardly visible. If you go down next to the river you can take some great photos with the water and the bridge. For many years this bridge has had to survive numerous floods. It's amazing that he's still here.
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Navárniz is at the foot of Mount Iluntzar. It stands at around 360 meters above sea level, making it high enough to have great views of the valley and mountains. It is a beautiful little town that is a good place to start an excursion.
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This is a terrific trail that is quite easy to follow. It is especially nice in spring when the flowers come out. It gets a bit wild in the summer when the vegetation is waist high, but that's part of the adventure!
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In this area you will find the Santimamiñe cave and very close to the painted Forest of Oma. In the cave there are paintings from the Magdalenian period of the Upper Paleolithic (13,000 BC). The paintings are of animals such as bison, horses, deer, goats, and brown bears. There is a 3D virtual tour available at the Visitor Center.
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This little section of the trail has it all. There is a stream crossing, there is a nice climb or descent depending on the direction, there are great views, there are wide parts and narrow sections. It is a very nice trail for mountain biking.
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This trail starts just outside of Berroia. It's a very nice trail, mostly straight, that takes you through a beautiful forest.
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You can explore over 100 mountain bike trails around Nabarniz. The region offers a diverse network, with 62 moderate routes and 34 difficult routes, ensuring options for various skill levels.
While the majority of trails are moderate to difficult, there are 4 easier mountain bike routes available around Nabarniz. These provide a good starting point for less experienced riders to enjoy the beautiful landscapes of the Urdaibai Biosphere Reserve.
Mountain biking around Nabarniz features a dynamic mix of terrains. You'll find high valleys, challenging mountain climbs, picturesque brooks, and lush green meadows. The routes often pass through extensive indigenous forests like the Oma and Basondo Holm Oak Woods, offering shaded singletracks and open paths with varied surfaces.
Yes, there are several circular mountain bike routes. A popular moderate option is Centro BTT Urdaibai Ruta 11 – circular desde Navárniz, which covers 12.4 miles (20.0 km) through varied terrain. Another challenging circular route is Centro BTT Urdaibai Ruta 4 – circular desed Mendata, a 20.6 miles (33.2 km) trail with significant elevation changes.
The region is rich in natural beauty and historical sites. You can encounter the majestic Oma Forest, known for its painted trees, or the historic Artzubi Bridge. The trails also offer panoramic views of the Urdaibai Biosphere Reserve, especially from higher elevations like Mount Illuntzar.
The mountain bike trails around Nabarniz are highly regarded by the komoot community, with an average rating of 4.8 stars from over 80 reviews. Riders frequently praise the challenging mountainous terrain, the extensive forests, and the panoramic views of the Urdaibai Biosphere Reserve.
Nabarniz is situated within the Urdaibai Biosphere Reserve, and while specific public transport links directly to trailheads can vary, the area is generally accessible. For detailed information on bus routes or train services to nearby towns like Gernika-Lumo or Mundaka, it's advisable to check local transport schedules.
While many routes feature significant elevation changes, there are 4 easier trails that could be suitable for families with some mountain biking experience. For a more relaxed ride, look for routes with less elevation gain and smoother surfaces, often found in the lower valley areas or around the edges of the forests.
The diverse natural landscapes of Nabarniz make it enjoyable for mountain biking across multiple seasons. Spring and autumn generally offer pleasant temperatures and lush scenery. While winter can be ridden, always check local weather forecasts as conditions can vary, especially at higher elevations like Mount Illuntzar.
As Nabarniz is located within the protected Urdaibai Biosphere Reserve, it's important to respect local regulations to preserve the natural environment. Generally, no specific permits are required for mountain biking on established trails, but riders should always stay on marked paths, avoid disturbing wildlife, and practice Leave No Trace principles. Always check for any updated local guidelines before your ride.
Parking availability can vary depending on the specific trailhead. Many routes, especially those part of the BTT Centers, often have designated parking areas in nearby villages or starting points. For example, routes like Centro BTT Urdaibai Ruta 4 start from Mendata, which typically offers parking options. It's recommended to check the specific route details on komoot for parking information at your chosen starting point.
Nabarniz, as the highest village in the Urdaibai Biosphere Reserve, offers some local amenities. You can often find cafes or small eateries in Nabarniz itself or in nearby towns like Gernika-Lumo or Mundaka, which are common access points for the region's trails. It's a good idea to plan your route to pass through these villages if you wish to refuel or rest.


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