Climb to the Sollube antennas and to the Urdaibai Biosphere Reserve - circular from Bermeo

Yes, this route is classified as a "difficult" road ride, requiring very good fitness. It covers approximately 37.9 km with a substantial elevation gain of 1,110 meters, primarily from the ascent to Sollube.

The most significant climb is to Sollube Summit Antennas and Viewpoint. The ascent from Bermeo to Sollube is about 8.2 kilometers long with an average gradient of 7.9% and a total ascent of 651 vertical meters, reaching a peak at 658 meters above sea level. Some sections feature gradients up to 15%, with ramps nearing 20%.

The route offers stunning scenery throughout. From the top of Sollube, you can enjoy almost 360-degree panoramic views of the surrounding Basque Country. The trail also passes through the Urdaibai Biosphere Reserve, providing diverse landscapes from coastal views near Mundaka Harbor and Surf Spot to green meadows and craggy mountains.

As the route is circular from Bermeo Harbor and Historic Center, you can typically find parking within the town. Look for public parking areas near the harbor or the historic center, keeping in mind that availability might vary, especially during peak season.

The route offers beautiful scenery year-round, but spring and autumn are generally ideal for cycling in the Basque Country, offering pleasant temperatures and vibrant landscapes. Summer can also be good, but be prepared for potentially warmer weather on the climbs. Winter cycling is possible but may involve colder temperatures and a higher chance of rain.

Starting and ending in Bermeo, you'll find numerous cafes, restaurants, and shops to refuel. The route also passes through other settlements like Busturia and Mundaka within the Urdaibai Biosphere Reserve, where you can find options for refreshments.

This is a road cycling route, so dogs are generally not suitable companions for the ride itself. If you are visiting the Urdaibai Biosphere Reserve, specific regulations regarding dogs may apply in certain areas, especially protected natural zones. Always keep dogs on a leash and clean up after them.

No, there are typically no entrance fees or specific permits required to cycle through the Urdaibai Biosphere Reserve. It is a UNESCO-designated area, and while you are free to explore, please respect the natural environment and any local regulations regarding protected areas.

This specific route from Bermeo to Sollube is considered by many to be the most enjoyable way to cycle this well-known climb, which has been featured in important cycling races for decades. A key advantage is the very low traffic compared to other routes to Sollube that use busier roads, offering a more tranquil and scenic experience.

Yes, the route also passes through sections of the [CIMA BI05] Sollube * Bermeo, [CIMA BI05] Sollube * Almike, and Bizkaiko bira trails.

The road surface is generally in good condition, making for a smooth ride. However, towards the very top of the climb to Sollube, it can become slightly broken in some parts. Despite this, it remains manageable for road bikes.