4.7
(57)
935
riders
94
rides
Mountain biking around Gautegiz Arteaga offers diverse terrain within the Urdaibai Biosphere Reserve. The region features a mix of coastal paths, estuary routes, and trails through natural areas like the Airo beech forest. Riders can encounter varied landscapes, from the marshes of Urdaibai to the slopes of Mount Atxarre. The area provides a range of surfaces, including paved sections and more challenging unpaved segments.
Last updated: July 2, 2026
3.5
(2)
13
riders
17.8km
01:21
420m
420m
Moderate mountain bike ride. Good fitness required. Suitable for all skill levels.
12
riders
70.3km
04:55
1,010m
1,010m
Hard mountain bike ride. Very good fitness required. Suitable for all skill levels.

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10
riders
Moderate mountain bike ride. Good fitness required. Suitable for all skill levels.
4.7
(3)
8
riders
Moderate mountain bike ride. Good fitness required. Suitable for all skill levels.
3
riders
24.5km
02:18
710m
710m
Moderate mountain bike ride. Good fitness required. Suitable for all skill levels.
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Picturesque old town with a relaxed surfer vibe
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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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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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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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This Roman necropolis is located very close to the highest point of the Sollube massif. Here they received the ashes of the cremated deceased from a nearby town, between the 1st and 3rd centuries AD. c.
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Mundaka is a picturesque coastal town located in the Urdaibai Biosphere Reserve. Its places of interest include a colorful old town next to the port and the beautiful hermitage of Santa Catalina, located on a wild cape with beautiful views of the sea and cliffs.
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The castle of Arteaga, also known as the castle of Empress Eugenia de Montijo, was built in the 19th century in neo-medieval style on the foundations of an 8th century castle. Its location stands out, in a large flat meadow surrounded by vegetation, unlike the medieval defensive castles built on a hill.
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There are over 100 mountain bike trails around Gautegiz Arteaga, offering a wide range of options for different skill levels and preferences within the beautiful Urdaibai Biosphere Reserve.
The terrain is quite varied, ranging from mostly paved surfaces along the estuary to more challenging unpaved segments through forests and up hills. You'll find a mix of coastal paths, routes through natural areas like the Airo beech forest, and trails offering panoramic views from points like Mount Atxarre.
Yes, while many routes are moderate to difficult, there are easier options available. For instance, the region offers routes that follow the estuary between Mundaka and Gernika-Lumo, which are generally flatter and more accessible. Look for trails rated as 'easy' or 'moderate' on komoot for a more relaxed experience.
You can encounter several interesting sights. Many routes pass by the impressive Artzubi Bridge and the historic Arteaga Castle. You might also cycle through the enchanting Oma Forest or enjoy stunning views over the Urdaibai marsh. Other attractions in the area include the Ozollo Tide Mill and the Urdaibai Bird Centre.
Yes, many of the mountain bike routes in Gautegiz Arteaga are designed as loops. For example, the Sukarrieta Coastal Path loop from Busturia Itsasbegi offers a moderate ride with coastal and estuary views, while the more challenging Arteaga Castle – Artzubi Bridge loop from Busturia Itsasbegi takes you past significant landmarks.
The region is generally pleasant for mountain biking for much of the year. Spring and autumn offer mild temperatures and beautiful scenery, making them ideal. Summer can also be good, especially for coastal routes, but be mindful of warmer temperatures. Winter riding is possible, but some trails might be muddy or require more robust gear.
Many trails in natural areas like the Urdaibai Biosphere Reserve are generally dog-friendly, especially if your dog is well-behaved and kept on a leash. However, it's always recommended to check specific trail regulations or local signage, particularly in protected areas or private lands, to ensure dogs are permitted.
Absolutely. Gautegiz Arteaga offers several difficult routes for experienced mountain bikers. These often include significant elevation gains and more technical sections. An example is the Arteaga Castle – Artzubi Bridge loop from Busturia Itsasbegi, which is rated as difficult and covers a substantial distance with considerable climbing.
The mountain bike trails in Gautegiz Arteaga are highly regarded by the komoot community, with an average rating of 4.7 stars from over 50 reviews. Riders often praise the diverse landscapes, the stunning views of the Urdaibai Biosphere Reserve, and the variety of routes catering to different skill levels.
Many routes provide excellent views of the Urdaibai Biosphere Reserve. For instance, the Urdaibai Biosphere Reserve – Water Fountain loop from Axpe directly traverses parts of the reserve. Additionally, ascents to points like Mount Atxarre offer spectacular panoramic vistas of the estuary and surrounding natural beauty.
Parking availability varies by trailhead. Many routes start from villages or designated parking areas within the Urdaibai Biosphere Reserve. It's advisable to check the specific route details on komoot for information on recommended starting points and parking options for each trail.
Yes, you can find routes that blend natural beauty with cultural heritage. The Oma Forest – Arteaga Castle loop from Ereño is a great example, taking you through the enchanting Oma Forest and past the historic Arteaga Castle, offering a rich and varied experience.


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