Best lakes around San Millán / Donemiliaga are primarily found in the form of large reservoirs within the wider Álava province, as the municipality itself is characterized by mountainous landscapes and dense beech forests. San Millán / Donemiliaga is integrated into the Aizkorri-Aratz Natural Park, known for its high peaks and karstic geology. While natural lakes are not prominent directly within its borders, nearby reservoirs offer significant recreational opportunities and natural beauty. These water bodies provide diverse activities and are…
Last updated: July 4, 2026
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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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A long, non-floating bridge that spans the swamp from side to side. During the day, many fishermen
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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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I went in July 2023. This cave is completely closed. There are signs from the Basque government saying DO NOT ENTER (and explaining the consequences and the work they're doing) and plastic tape blocking the entrance. There are lots of constructions tools around too. Don't expect to get in unless you're willing to destroy the small stone wall and all the tape blocking the entrance.
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I love gravel!! Return to the swamp with hardly any unevenness. Enjoyable output with very beautiful landscapes. All track, flat, ideal terrain both for those who are starting out in this sport and for those who want to "push" and pick up speed on the flat 🚀🚀.
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San Millán / Donemiliaga itself is characterized by rivers, streams, and forests. The 'lakes' in the wider region are primarily large reservoirs, such as the Ullíbarri-Gamboa reservoir, which offer significant recreational opportunities and natural beauty. These are man-made water bodies rather than natural lakes.
Visitors enjoy the Pedestrian and cycle bridge, which is part of a circular route around a reservoir, and the Azua Footbridge, a nearly half-kilometer long walkway across the Ullíbarri-Gamboa reservoir offering extensive views. The Ullíbarri-Gamboa Reservoir Trail is also very popular for its smooth walks and scenic views.
Yes, several spots are ideal for families. The Pedestrian and cycle bridge and the Azua Footbridge are both family-friendly. The Ullíbarri-Gamboa Reservoir Trail offers routes suitable for various ages and physical conditions, providing a smooth walk without significant elevation changes. The Irrigation Reservoirs by the Vasco Navarro Greenway also provide a family-friendly environment for cycling and walking.
Absolutely. The reservoirs are excellent for both cycling and walking. The Pedestrian and cycle bridge is part of a circular route perfect for both activities. The Ullíbarri-Gamboa Reservoir Trail is also a designated cycleway, offering beautiful views and a smooth path. Additionally, the Irrigation Reservoirs by the Vasco Navarro Greenway are part of a greenway with little unevenness, suitable for mountain biking and gravel cycling.
Beyond walking and cycling around the reservoirs, the region offers extensive outdoor activities. You can find numerous MTB Trails, Mountain Hikes, and Running Trails in the surrounding areas of San Millán / Donemiliaga, catering to various difficulty levels.
While large natural lakes are not prominent, the region is rich in water systems. The source of the Zadorra River is a significant natural monument. Additionally, the Cueva de Los Cristinos, located within the Urbasa-Andia Natural Park, is a spectacular cave featuring an underground lake and streams, offering a challenging but rewarding natural experience.
Visitors appreciate the magnificent environment for both walking and cycling, especially the peculiar experience of crossing bridges like the Pedestrian and cycle bridge. The long walkways and beautiful views, such as those from the Azua Footbridge, are also highly rated. The smooth, scenic trails around the Ullíbarri-Gamboa reservoir are noted for being suitable for all ages and physical conditions.
The reservoirs and surrounding natural areas are generally enjoyable throughout the year. Spring and autumn offer pleasant temperatures for walking and cycling, with vibrant natural colors. Summer is ideal for water-related activities and longer days, while winter can provide a serene, unique landscape for those prepared for cooler weather.
Yes, loop trails are available. The Pedestrian and cycle bridge is specifically mentioned as being part of a circular route around a reservoir. The Ullíbarri-Gamboa Reservoir Trail also offers routes that can be enjoyed as loops, providing continuous scenic views.
Information regarding wild swimming in the reservoirs is not explicitly provided. It is always advisable to check local regulations and signage at each specific reservoir before attempting to swim, as conditions and permissions can vary.
Many trails around the reservoirs, such as the Ullíbarri-Gamboa Reservoir Trail, are described as offering a smooth walk without significant elevation changes, making them accessible for various ages and physical conditions. The greenways, like the one near the Irrigation Reservoirs, also have little unevenness, suitable for a wider range of visitors.


Still not found your perfect lake around San Millán / Donemiliaga? Check out the guides of these regions to see even more beautiful places.