4.7
(6)
76
riders
5
rides
Gravel biking around Zalduondo offers diverse terrain within the Aizkorri-Aratz Natural Park, characterized by limestone mountains, beech forests, and expansive pasture plains. The region features a network of unpaved segments and varied surfaces, ideal for gravel bikes. Mountain passes like Opakua Pass provide challenging climbs and rewarding views, while ancient paths such as the Camino Real offer exploration opportunities.
Last updated: July 11, 2026
4.4
(5)
59
riders
127km
09:42
1,280m
1,280m
Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.
2
riders
Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.

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6
riders
42.5km
02:31
350m
340m
Moderate gravel ride. Good fitness required. Mostly paved surfaces. Suitable for all skill levels.
2
riders
Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.
1
riders
18.6km
01:10
160m
150m
Moderate gravel ride. Good fitness required. Mostly paved surfaces. Suitable for all skill levels.
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pedestrian walkways of the marsh nearby
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Beautiful views. Be careful if you're fishing on the bridge; it's very narrow and you could fall hard.
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There is light at the end of the tunnel... One yes and one no... But it looks perfect... The only thing that makes it look really cool.... Hahahahaha
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A long, non-floating bridge that spans the swamp from side to side. During the day, many fishermen
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Good area for walking or cycling
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Simple route for all audiences
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Within the path surrounding the Ullibarri Ganboa reservoir, there is this very peculiar footbridge that crosses the water, offering a totally different view from any other you can see surrounding a reservoir...
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There are 5 dedicated no-traffic gravel bike trails detailed in this guide. These routes offer a range of experiences, from moderate to difficult, allowing you to explore the diverse landscapes of the region without vehicle interference.
You can expect a diverse mix of terrain. Routes often wind through picturesque beech forests and expansive pasture plains, offering both shaded and open sections. Many segments are unpaved, perfect for gravel bikes, and you'll encounter varied surfaces from smooth to rugged, especially as you approach the Aizkorri-Aratz Natural Park and the Sierra de Entzia.
Yes, several routes are designed as loops. For example, the challenging Vasco-Navarro Railway Bridge – Atauri Tunnel loop from Agurain-Salvatierra de Álava offers a substantial circular ride, as does the Marieta-Larrintzar – Azua Footbridge loop from Agurain-Salvatierra de Álava.
While many routes in this guide are rated moderate to difficult, the region does offer varied terrain. For a moderately challenging option, consider the Itaida Menhir – Opakua Pass loop from Itaida, which is shorter and has less elevation gain compared to the more difficult routes. Always check the route details for specific difficulty and elevation to ensure it suits your group's skill level.
The trails offer access to stunning natural beauty and historical points. You might encounter the dramatic limestone mountains of the Aizkorri-Aratz Natural Park, including mountain passes like Opakua Pass. The ancient Camino Real path and the historic San Adrián Tunnel are also significant attractions in the wider area, offering unique exploration opportunities.
Yes, the region is rich in history. Zalduondo itself boasts medieval charm with beautiful house facades. Cycling routes can also lead to interesting nearby settlements like Agurain/Salvatierra, an ancient medieval site, providing opportunities for cultural breaks and exploration.
Many routes start from towns like Agurain-Salvatierra de Álava or Iturrialdia, which typically offer public parking facilities. For routes venturing deeper into the Aizkorri-Aratz Natural Park, look for designated parking areas at park entrances or trailheads. Always check local signage for specific parking regulations.
While Zalduondo is a charming village, public transport options directly to all trailheads might be limited. Agurain-Salvatierra de Álava, a common starting point for several routes, is a larger town and may have better public transport connections. It's advisable to check local bus schedules to these towns in advance.
Generally, dogs are welcome on many outdoor trails in the region, especially in natural parks like Aizkorri-Aratz. However, it's crucial to keep them on a leash, especially in areas with livestock or wildlife, and to follow all local regulations. Always ensure your dog is well-behaved and that you clean up after them.
The komoot community highly rates the experiences in this area, with an average score of 5.0 stars. Reviewers often praise the tranquility of the car-free paths, the stunning natural scenery, and the rewarding challenge of the diverse terrain, particularly within the Aizkorri-Aratz Natural Park.
Zalduondo village itself offers some amenities, and larger nearby towns like Agurain-Salvatierra de Álava provide more options for cafes, pubs, and accommodation. Along longer routes, you might find small villages or even mountain huts like the Urbia Inn, which can offer a welcome break. Always plan your route to include potential stops for food and water.
Spring and autumn are generally ideal for gravel biking in Zalduondo, offering pleasant temperatures and vibrant landscapes. Spring brings blooming wildflowers, while autumn showcases stunning foliage in the beech forests. Summer can be warm, especially at lower elevations, so early morning rides are recommended. Winter can be challenging due to colder temperatures and potential snow, particularly in higher mountain passes.


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