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Kortezubi

The best MTB trails around Kortezubi

4.6

(36)

643

riders

80

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.

Best mountain bike trails around Kortezubi

  • The most popular mountain bike trail is Centro BTT…

Last updated: May 4, 2026

5.0

(1)

14

riders

#1.

Centro BTT Urdaibai Ruta 8 – Reserva de la Biosfera de Urdaibai

46.8km

04:32

1,590m

1,590m

Hard mountain bike ride. Very good fitness required. Advanced riding skills necessary.

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Hard

4.0

(3)

25

riders

Moderate mountain bike ride. Good fitness required. Suitable for all skill levels.

Moderate
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Hard mountain bike ride. Very good fitness required. Advanced riding skills necessary.

Hard

Hard mountain bike ride. Very good fitness required. Suitable for all skill levels.

Hard

5.0

(1)

13

riders

Moderate mountain bike ride. Good fitness required. Suitable for all skill levels.

Moderate
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Tips from the Community

Josu Madariaga
May 10, 2025, Ozollo Errota Tide Mill

The municipality of Gautegiz-Arteaga preserves the only tidal flour mill that once existed on the Urdaibai estuary: the Ozollo Errota tidal mill. Furthermore, the Arteaga mill is the best preserved and the only one that retains most of its facilities. The mill was built around 1683, in the marshland of Laida Beach, in the Kanala area. An area of the marsh was used for its construction, enclosing it with walls, and it was fed by the dam in the rear reservoir. In addition to the milling house, where the drive wheels were installed, the mill has a building at the lowest point of the reservoir. This is a house located on the edge of the estuary, above the same water inlet and outlet. Therefore, the Ozollo Errota tidal mill is the most notable heritage structure in Urdaibai. The mill ceased to operate in the early decades of the 20th century and has been privately owned for several years.

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Thomas
December 30, 2024, Bosque de Oma

The Oma Forest - Omako basoa in Basque - is also known as the painted forest, the enchanted forest or even the Ibarrola Forest. Its most common name - Oma Forest - refers to the district in which it is located, which belongs to the municipality of Kortezubi. This original work of art was created between 1982 and 1985, when the Basque painter and sculptor Agustín Ibarrola used the trunks of trees as a kind of canvas for a total of 47 images. On them he painted animals, geometric figures and people, or just parts of them, such as eyes and lips. In addition, many of the compositions do not consist of a single tree, but must be viewed in the context of several tree trunks. To do this, you must pay attention to the signs on the ground that tell the viewer where to stand in order to enjoy the whole image.

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When the Condor attacked, the residents of Guernica tried to protect the tree with their bodies because it is sacred to the Basques. Even today, elected politicians have to swear their loyalty to the Basque Country at an oak tree that stands a few meters away.

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Marc
August 25, 2024, Laida Beach

The beach is there only at Ebb and disappears completely under the waves at high tide. From this point you also have a great view of the village of Mundaka

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In 1982, artist Agustín Ibarrola began painting the pine trees in the forest near his homestead with the intention of using the landscape as a canvas to give continuity to his artistic expression. It is at this moment when he decides to break the law of perspective and transgress the three-dimensionality of a white line until it becomes two-dimensional. From then on, he explored the possibilities offered by the arrangement of the forest trees, playing with the different planes of depth and creating artistic sets composed of human figures, curves or straight lines, and circles of intense colors. The ideas and concepts that it develops become more complex and advances in various directions as the painted forest expands. With the help of two students from the Faculty of Fine Arts of the UPV/EHU, he carried out a large part of the work that was open to the public until 2018, at which time the biological cycle of the forest came to an end. Given the importance that the work had acquired, the Provincial Council of Bizkaia began the process of making the Forest last, for which it had from the first moment the support of the artist who had made clear his desire for the forest to survive. In this way and in order to preserve El Bosque de Oma, the Ibarrola work has been moved to a new location, also recovering original artistic ensembles lost due to felling, attacks and natural tree falls. Today we can enjoy El Bosque de Oma more complete and more faithful to the artist's original idea.

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The Forest of Oma is one of the best-known works of the Basque artist Agustín Ibarrola and is an expression of the artistic movement known as Art and Nature, which emerged in the late sixties of the 20th century and whose purpose is to convey artistic work to the natural environment, using the landscape as a framework, support and raw material for the artist. The work, located in the town of Kortezubi (Bizkaia), is made up of several sets of geometric motifs and figures painted on the trunk of radiata pine trees. The use of natural living supports, the play of two-three-dimensionality and the experience of placing the visitor at the center of the work of art through his discovery, as well as the diversity of responses it proposes, make this work a reference of the Art and Nature movement and of Basque Art in particular.

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TenaciousD
September 15, 2023, Bizkargi

A small chapel that marks the peak of Bizkargi at 557 meters. Beautiful views on a clear day.

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The work is planned so that an open point in the walls becomes a window from which one can see the Gernika tree.

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Frequently Asked Questions

How many mountain bike trails are there in Kortezubi?

There are over 80 mountain bike trails around Kortezubi, offering a wide range of options for different skill levels and preferences.

What are the difficulty levels of mountain bike trails around Kortezubi?

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.

Are there any long mountain bike routes near Kortezubi?

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.

Are there family-friendly mountain bike trails in Kortezubi?

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.

What kind of terrain can I expect on mountain bike trails in Kortezubi?

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.

Are there any circular mountain bike routes in Kortezubi?

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.

What can I see along the mountain bike trails in Kortezubi?

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.

What is the best time of year for mountain biking in Kortezubi?

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.

Are there mountain bike trails with scenic views around Kortezubi?

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.

What do other mountain bikers say about the trails in Kortezubi?

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.

Is there parking available near the trailheads in Kortezubi?

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.

What should I know about mountain biking in Kortezubi during rainy weather?

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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