4.6
(57)
921
riders
95
rides
Mountain biking around Forua offers diverse terrain within the Urdaibai Biosphere Reserve, featuring lush forests, rolling green hills, and coastal views of the Mundaka estuary. The region's varied topography provides routes ranging from gentle paths to challenging ascents, often following rivers or passing through vineyards. Riders can explore significant natural landmarks such as the Oma forest and experience ascents to local hills. This area is well-suited for mountain biking due to its extensive network of trails.
Last updated: July 2, 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.
4.0
(3)
25
riders
26.1km
02:11
700m
700m
Moderate mountain bike ride. Good fitness required. Suitable for all skill levels.

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19
riders
43.1km
03:40
1,060m
1,060m
Hard mountain bike ride. Very good fitness required. Advanced riding skills necessary.
14
riders
45.0km
03:37
940m
940m
Hard mountain bike ride. Very good fitness required. Suitable for all skill levels.
4.0
(1)
9
riders
40.4km
03:28
1,020m
1,020m
Hard mountain bike ride. Very good fitness required. Advanced riding skills necessary.
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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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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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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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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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There are over 100 mountain bike trails around Forua, offering a wide range of options for all skill levels within the Urdaibai Biosphere Reserve.
The trails around Forua offer a diverse range of difficulties. While there are a few easy routes, the majority are classified as moderate (over 60 trails) or difficult (over 30 trails), providing options for both casual riders and experienced mountain bikers seeking a challenge.
Yes, Forua offers a few easy mountain bike trails suitable for families or beginners. The Urdaibai Bike Reserve actively promotes cycling for all levels, ensuring there are options for less demanding rides. Look for routes classified as 'easy' on komoot for the most suitable options.
Mountain biking in Forua features incredibly diverse terrain. You'll encounter lush forests, rolling green hills, and dramatic cliffs along the Cantabrian coast. Many routes offer spectacular views of the Mundaka estuary, pass through vineyards, or follow rivers like the Berrekondo and Golako. Some sections may involve challenging ascents to peaks like Mount Illuntzar and Atxarre.
Yes, many mountain bike routes around Forua are circular, allowing you to start and end in the same location. For example, the Arrola Oppidum loop from Institutoa is a popular moderate circular path, and the Sukarrieta Coastal Path – Mundaka Harbor loop from Forua offers coastal views on a moderate loop.
The trails often pass by significant natural landmarks and offer stunning views. You can explore the notable Oma Forest, enjoy views over the Urdaibai marsh, or ascend to viewpoints like San Pedro de Atxarre. Some routes also follow rivers and pass through vineyards, adding to the scenic beauty.
Yes, the region integrates cultural and historical attractions into its outdoor offerings. You might pass by sites like the Guernica Mural in Gernika, the Santa Catalina Hermitage and Mundaka Harbor, or the Artzubi Bridge. These add a rich cultural dimension to your ride.
The Urdaibai Biosphere Reserve offers good mountain biking conditions for much of the year due to its mild climate. Spring and autumn generally provide the most pleasant temperatures and lush scenery. While winter can be ridden, some trails might be wetter, and summer can be warm, especially on exposed sections.
The mountain bike trails around Forua are highly regarded by the komoot community, with an average rating of 4.6 stars from over 50 reviews. Riders frequently praise the diverse landscapes, ranging from coastal views to lush forests, and the variety of routes suitable for different skill levels.
Absolutely. For experienced riders seeking a longer challenge, routes like the Centro BTT Urdaibai Ruta 8 – Reserva de la Biosfera de Urdaibai cover nearly 47 km with significant elevation gain, typically taking over 4 hours to complete. Another challenging option is the Oma Forest – Laida Beach loop from Institutoa, which is over 45 km long.
Yes, many routes in the Urdaibai Biosphere Reserve offer stunning coastal views. The Sukarrieta Coastal Path – Mundaka Harbor loop from Forua is a great example, providing spectacular vistas of the Mundaka estuary and the sea. You can also find sections of footbridges along the Urdaibai marshes for a unique riding experience.


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