4.6
(45)
560
riders
87
rides
Mountain biking around Kortezubi offers a diverse landscape within the Urdaibai Biosphere Reserve. The region is characterized by a mix of coastal paths, dense woodlands, and rolling hills, providing varied terrain for mountain bikers. Elevations are moderate, with routes often traversing through natural parks and along river valleys. The area's geology includes a blend of forest trails and open sections, suitable for different skill levels.
Last updated: July 29, 2026
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.
5.0
(1)
24
riders
31.3km
02:51
840m
840m
Moderate mountain bike ride. Good fitness required. Advanced riding skills necessary.

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4.0
(4)
25
riders
26.1km
02:11
700m
700m
Moderate mountain bike ride. Good fitness required. Suitable for all skill levels.
18
riders
42.3km
03:45
1,170m
1,170m
Hard mountain bike ride. Very good fitness required. Advanced riding skills necessary.
5.0
(2)
12
riders
48.0km
04:27
1,420m
1,420m
Hard mountain bike ride. Very good fitness required. Suitable for all skill levels.
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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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essential to fill miraculous water bottle
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A small chapel that marks the peak of Bizkargi at 557 meters. Beautiful views on a clear day.
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Small hermitage located on a hill at 791 meters above sea level, near the top of Monte Oiz. It is a place of great devotion and tradition, and offers stunning panoramic views of the surrounding valleys and mountains.
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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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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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Nice trail along the edge of a tree farm. It can get overgrown at times and when wet it can be difficult, but overall a good trail.
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This is a lovely trail that can be a bit difficult when wet but otherwise easy to follow.
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There are over 80 mountain bike trails around Kortezubi, offering a wide range of options for different skill levels and preferences.
Kortezubi offers a diverse range of trails. You'll find 4 easy routes, 54 moderate routes, and 24 difficult routes, catering to beginners, intermediate riders, and experienced mountain bikers alike.
Yes, for those looking for longer rides, routes like the Oma Forest – Laida Beach loop from Institutoa cover approximately 45 km, offering a substantial challenge and exploration of the region's diverse landscapes.
While specific family-designated trails aren't highlighted, the region's 4 easy routes and many of the 54 moderate routes can be suitable for families, depending on their experience. These often traverse through woodlands and along less challenging paths.
The trails in Kortezubi, located within the Urdaibai Biosphere Reserve, feature a mix of coastal paths, dense woodlands, and rolling hills. You'll encounter varied terrain, from forest trails to open sections, with moderate elevations throughout the region.
Yes, many routes are designed as loops. For example, the Arrola Oppidum loop from Institutoa is a popular moderate circular route that combines forest trails with open sections and passes by the historic Arrola Oppidum.
Many trails offer opportunities to see natural and cultural attractions. You might pass by the Oma Forest, enjoy Views over the Urdaibai marsh, or even see the Guernica Mural in Gernika on certain routes.
Given its coastal influence and diverse landscapes, spring and autumn generally offer the most pleasant conditions for mountain biking in Kortezubi, with milder temperatures and lush scenery. Summer can also be good, but be prepared for warmer weather, especially on exposed sections.
Absolutely. The region's coastal paths and rolling hills within the Urdaibai Biosphere Reserve provide numerous scenic viewpoints. Look for routes that traverse along the coast or climb to higher elevations for panoramic vistas, such as those offering Views over the Urdaibai marsh.
The mountain bike trails in Kortezubi are highly rated by the komoot community, with an average score of 4.6 stars from over 40 reviews. Riders often praise the diverse terrain, the beauty of the Urdaibai Biosphere Reserve, and the variety of options for different skill levels.
While specific parking areas are not detailed for every trailhead, Kortezubi and surrounding towns typically offer public parking options. It's advisable to check local maps or komoot route details for designated parking spots near your chosen starting point.
Kortezubi's climate can bring rain, especially outside of summer. Trails, particularly those through dense woodlands, can become muddy and slippery. It's recommended to check the weather forecast, wear appropriate gear, and choose routes known to drain well if riding after heavy rain.


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