4.3
(13)
262
riders
20
rides
Gravel biking around San Millán / Donemiliaga offers diverse natural landscapes within Spain's Basque Country, characterized by varied terrain suitable for mixed-surface cycling. The region features a mix of light to chunky gravel and quiet tarmac roads, with options ranging from challenging mountain routes to less technical paths. Situated within the Aizkorri-Aratz Natural Park, the area provides well-preserved natural environments, including dense beech, gall oak, and holm oak forests, alongside rural tranquility. This setting allows for exploration of deserted backroads…
Last updated: July 2, 2026
4.0
(1)
87
riders
Moderate gravel ride. Good fitness required. Mostly paved surfaces. Suitable for all skill levels.
5.0
(1)
37
riders
103km
08:01
1,110m
1,110m
Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.

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3.5
(2)
27
riders
65.7km
05:13
370m
370m
Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.
5.0
(1)
20
riders
61.2km
04:21
930m
930m
Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.
3.5
(2)
23
riders
31.3km
02:12
350m
360m
Moderate gravel ride. Good fitness required. Mostly paved surfaces. Suitable for all skill levels.
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Mountain Hikes around San Millán / Donemiliaga
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 good place to stock up on supplies before climbing Gereñu along the trail and descending to Maestu. Fountain and shaded benches
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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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The region offers a diverse mix of terrain, ideal for gravel biking. You'll encounter everything from light to chunky gravel roads, quiet tarmac sections, and forest roads. The routes traverse varied landscapes within the Aizkorri-Aratz Natural Park, including dense beech, gall oak, and holm oak forests, as well as rural backroads.
While many routes offer moderate to difficult challenges, there are options for those seeking a less strenuous ride. For example, the Sanctuary of Estibaliz – VASCO-NAVARRO GREENWAY loop from Argandoña is a moderate 31.3-mile (50.3 km) trail that provides a good introduction to the area's gravel biking, incorporating sections of the historic Vasco-Navarro Greenway.
For experienced gravel bikers looking for a challenge, the region offers several difficult routes. The Azua Footbridge – View of the Zadorra River loop from Alegría-Dulantzi is a demanding 63.3-mile (101.8 km) path with significant elevation changes, featuring expansive views of the Zadorra River. Another difficult option is the Aberasturi Fountain loop from Arraia-Maeztu, a 38.1-mile (61.4 km) trail through rural landscapes.
San Millán / Donemiliaga is rich in natural beauty and historical sites. You can explore the Aizkorri-Aratz Natural Park with its diverse forests. Notable landmarks include the prehistoric Eguilaz Dolmen (Aizkomendi Dolmen) near Eguilaz, and the 12th-century Monastery of San Bernardo de Barria. The Ullibarri-Gamboa Reservoir loop from Mendixur offers scenic views around the reservoir itself.
Yes, many of the gravel bike routes in San Millán / Donemiliaga are designed as loops, allowing you to start and finish in the same location. Popular circular routes include the Ullibarri-Gamboa Reservoir – Ullíbarri-Gamboa Reservoir loop from Mendixur and the Aberasturi Fountain loop from Arraia-Maeztu.
The region's diverse climate, influenced by both Atlantic and Mediterranean conditions, means varied weather. Generally, spring and autumn offer pleasant temperatures and vibrant scenery, making them ideal for gravel biking. Summers can be warm, while winters might bring cooler, wetter conditions, especially in higher elevations within the Aizkorri-Aratz Natural Park.
While specific 'family-friendly' routes are not explicitly highlighted, the presence of less technical greenways and quiet rural roads suggests that some moderate routes could be suitable for families with older children or those comfortable with mixed terrain. Always check the route's difficulty and elevation profile before heading out with family.
The gravel biking routes in San Millán / Donemiliaga are highly rated by the komoot community, with an average score of 4.6 stars from over 10 reviews. Riders often praise the diverse terrain, which includes forest roads and tranquil rural backroads, and the immersive experience within the well-preserved natural environments of the Aizkorri-Aratz Natural Park.
Yes, for those seeking longer rides, the region offers several extended routes. The Azua Footbridge – View of the Zadorra River loop from Alegría-Dulantzi covers over 63 miles (101 km), providing a significant challenge. Another long option is the Vasco-Navarro Railway Bridge – Atauri Tunnel loop from Arabako Mendialdea, which spans over 94 km (58 miles) and incorporates historical railway infrastructure.
San Millán / Donemiliaga is a rural municipality with 15 small villages, offering a peaceful setting. While specific cafes or pubs on trails are not listed, the main center of Ordoñana and other villages will have local establishments. For accommodation, the 12th-century Monastery of San Bernardo de Barria in Barria now functions as a hostel. Additionally, komoot highlights several huts and shelters in the broader area, such as Urbia Inn and Aizkorri Refuge and Hermitage, which might offer basic amenities or lodging.
Absolutely! Beyond the natural landscapes, you can visit the Sanctuary of Our Lady of Estíbaliz, a significant religious building. The Vasco-Navarro Railway Greenway offers a historical route, and you might encounter interesting structures like the Pedestrian and cycle bridge. For a unique experience, explore the San Adrián Tunnel.


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