Monte Oiz and Balcón de Bizkaia Loop

This loop is considered difficult and requires very good fitness. The climbs to Monte Oiz are extremely challenging, with gradients that can reach over 20% and even up to 24% in certain sections, especially in the last 5 kilometers to the wind turbines. Some cyclists may even need a 30 or 32-tooth sprocket, or find themselves pushing their bikes on the steepest parts.

The scenery is spectacular, especially as you ascend. You'll enjoy panoramic views of the Basque coastline, the mountainous landscape of the Urdaibai basin, and dense forests. On clear days, the views from the summit can extend to the Cantabrian coast, the entire Urdaibai Biosphere Reserve, and even the peaks of the western Pyrenees. You'll also see distinctive wind turbines near the summit.

Beyond the challenging climbs and stunning views, you'll pass several notable spots. These include the historic Ereño Marble Quarries, the charming Nabarniz Village, and the iconic Balcón de Bizkaia Viewpoint, known for its breathtaking vistas and local legends. The route also takes you through Muxika town centre and Mendata Village.

The tour starts from Gernika, a town with historical significance. You can typically find parking in Gernika-Lumo, which serves as a convenient starting point for this loop. Specific parking areas may vary, so it's advisable to check local parking options upon arrival.

The best time to cycle this loop is generally during the spring and autumn months when the weather is milder and more stable. Summer can also be good, but be prepared for potentially higher temperatures. Always check the weather forecast before you go, as conditions on Monte Oiz can change quickly, especially at higher elevations.

No, there are no specific permits or entrance fees required to cycle the Monte Oiz and Balcón de Bizkaia Loop. The entire area is part of the Urdaibai Biosphere Reserve, which is a protected natural environment, but it is freely accessible for cycling.

While the Urdaibai Biosphere Reserve is generally welcoming, this specific route is designed for road cycling. Bringing a dog along on a road bike can be challenging and potentially unsafe due to the demanding terrain and traffic. If you wish to explore the area with a dog, consider alternative hiking or less strenuous cycling paths in the region.

Road surfaces are generally good, but some sections, particularly closer to the summit of Monte Oiz, can be narrow concrete tracks. While these were resurfaced before the 2018 Vuelta a España, they can still be corrugated, cracked, or broken in places, adding to the challenge of the climb.

Yes, this route incorporates sections of several other paths. Notably, it covers parts of the challenging [CIMA BI13] Monte Oiz * Gernika and [CIMA BI13] Monte Oiz * Zugastieta climbs. You'll also find yourself on segments of the Northern Route (Basque Country) and the Ardoaren eta arrainaren bidea.

Monte Oiz holds deep cultural importance in Basque history. It is one of the five "Deiadar-Mendiak" (visible summits) from which fires were lit or horns were sounded in medieval times to summon local government meetings. It's also steeped in mythology, believed to be the dwelling place of the goddess Mari alongside Mount Anboto, and has gained recognition through its inclusion in the prestigious Vuelta a España.

The route passes through several villages like Nabarniz Village, Muxika town centre, and Mendata Village. These offer opportunities to find cafes, bars, or small shops where you can refuel and rest. It's always a good idea to carry sufficient water and snacks, especially given the challenging nature of the climbs.