Arantzazu Sanctuary and Udana Pass Loop

This is a difficult road cycling route, classified as a 'Hard road ride'. It demands very good fitness due to its significant elevation gain of 1,830 meters over 77.6 kilometers. Cyclists should be prepared for a long and strenuous effort.

Given its distance and elevation gain, completing this route typically takes well over five hours of riding time for experienced cyclists.

The route primarily features mostly well-paved surfaces that are generally easy to ride. However, some segments may include unpaved or difficult sections, characteristic of a challenging mountain road ride in the Basque region.

Key highlights include the challenging Atagoiti and Udana Pass Ascent mountain passes. The journey culminates at the stunning Sanctuary of Arantzazu, a significant architectural and religious landmark dramatically situated on a cliff edge.

As the route is circular from Zegama, you can typically find parking within the town to begin your ride. Specific parking areas for cyclists are usually available near the town center or designated public parking lots.

The best time to cycle this route is generally during the spring and autumn months when the weather is milder and more stable. Summer can also be pleasant, but be prepared for potentially warmer temperatures on the climbs. Always check the weather forecast before you go, especially for mountain conditions.

Generally, there are no specific permits or entrance fees required for cycling on public roads within the Aizkorri-Aratz Natural Park. However, always respect local regulations, stay on marked routes, and be mindful of the natural environment.

As this is a demanding road cycling route, it is not typically considered 'dog-friendly' in the traditional sense of a hiking trail. If you plan to bring a dog, they would need to be able to keep pace with a bicycle or be carried safely, which is generally not recommended for such a strenuous ride.

You'll traverse the picturesque Basque Mountains in Gipuzkoa, specifically within the Aizkorri-Aratz Natural Park. Expect stunning natural beauty, including lush green forests, rugged limestone peaks, and deep valleys with streams. The dramatic setting of the Sanctuary of Arantzazu is a highlight.

Yes, the route briefly intersects with sections of other trails, including the [CIMA GP01] Aranzazu, E3 Gaztaren Ibilbidea: Segura - Mirandaola, and the Camino de Santiago Vasco del Interior.

Given the route's difficulty and elevation, you should bring a well-maintained road bike with appropriate gearing for steep climbs. Essential gear includes a helmet, sufficient water and nutrition, repair kit, spare tubes, and layers of clothing suitable for changing mountain weather. A GPS device with the route loaded is also highly recommended.