Portillo de Busto Mountain Pass Road in Parque Natural Montes Obarenes-San Zadornil

The road is located in the autonomous community of Catalonia, Spain, within the Parque Natural Montes Obarenes-San Zadornil. This natural park is known for its diverse landscapes and protected ecosystems. The road traverses the mountainous terrain of the park, crossing the Portillo de Busto mountain pass at an elevation of 1,003 m (3,291 ft). The route ends near the small village of Busto de Bureba, providing access to local natural attractions. An interactive map showing the road can be found at the end of this article.

The road is approximately 10.6 kilometers (6.6 miles) long and features a high-quality asphalt surface rated 4.9 out of 5. It is a two-lane road throughout its length, with a consistently wide carriageway (about 100%). The road is moderately twisty, offering a balanced riding experience without extreme curves, making it suitable for riders of varying skill levels. The speed limits vary between 50 km/h (31 mph) and 70 km/h (43 mph), reflecting the road's mountain pass nature and safety considerations.

Only a small portion of the road (about 1.9%) passes through inhabited areas, ensuring a predominantly natural riding environment. The route also includes a viewpoint, allowing riders to pause and appreciate the surrounding landscape within the natural park.

The Portillo de Busto mountain pass is the defining feature of this road, situated at 1,003 m (3,291 ft) elevation. It provides a natural crossing point through the Montes Obarenes mountain range. The road's passage through the Parque Natural Montes Obarenes-San Zadornil means riders can enjoy the protected flora and fauna of this area. The park is recognized for its ecological value and offers various outdoor activities beyond motorcycling.

More information about the park can be found on the official website of the Parque Natural Montes Obarenes-San Zadornil and its Wikipedia page Parque natural de Montes Obarenes-San Zadornil.

The road starts near the natural park area and ends close to the village of Busto de Bureba, a small settlement providing local amenities. The route is accessible year-round, although riders should verify seasonal conditions as mountain roads in this region can be affected by winter weather. The road's excellent surface quality and wide lanes facilitate safe and comfortable riding.

There are no known tolls or entrance fees for using this road, but riders should be aware that toll policies can change. For updated information on road tolls and fees in Spain, consult the official Spanish road authority websites.

For those interested in exploring the area further, the natural park offers hiking and sightseeing opportunities. The viewpoint along the road provides a good spot to stop and take in the views.