Best mountain passes around Merindad De Montija are characterized by limestone ridges, siliceous peaks, and high-altitude summits. This region in Burgos, Spain, offers a landscape suitable for various outdoor activities. It features notable mountain passes and significant high points. The area provides diverse terrain for exploration.
Last updated: July 1, 2026
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Starting point of the route to El Mazo, El Reluso, El Cordón de la Cuchilla and the Redux Window.
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Mountain pass that divides the Karrantza Valley from the Lanestosa Valley, the last town in Bizkaia.
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This is one of the best-known climbs in the province of Burgos, not only because it's always the star stage of the Vuelta a Burgos but also because it has appeared in key stages of the Vuelta a España, one of the three most important stage races in the world. A brutal eight-and-a-half-kilometer climb at an average gradient of over 9%.
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El Picón Blanco is a well-known mountain pass, very popular among road cyclists, although it is gaining popularity among donkey lovers, since it can be reached by a forest track in good condition for those who prefer to avoid asphalt. From here it is usually connected to the port of La Sía, the most popular among the ports of Pas.
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"Pass" height at 641 meters with a pretty nice view.
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A fantastic alternative to climb Los Tornos from Soba. A road in perfect condition where it is difficult to find another vehicle. The beginning of the itinerary to La Revilla is surrounded by forests and from Fresnedo the road changes slope and we can enjoy a panoramic view that goes from the Picón Blanco to the Sierra del Hornijo. In winter the view is even more spectacular with all those snowy mountains. After 10 kilometers of ascent, without any notable difficulty, we reached the intersection with the Los Tornos road from where we only had 2.8 kilometers left to reach the pass.
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Although it is a bit gloomy, it could be a good safeguard
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Merindad de Montija is renowned for its challenging cycling routes. La Sía Pass is particularly popular among cyclists due to its demanding ascent and magnificent views. Another formidable challenge is Ascent to Picón Blanco from Espinosa de los Monteros, known for its steep gradients and its inclusion in major cycling races like the Vuelta a España.
For breathtaking vistas, consider visiting Puerto de las Estacas de Trueba, which provides postcard-worthy panoramic views from its various viewpoints. The summit of La Sía Pass also offers magnificent views, especially towards the Cantabrian side. Additionally, Los Tornos via La Revilla and Fresnedo offers panoramic views extending from Picón Blanco to the Sierra del Hornijo.
Yes, Picón Blanco stands out for its historical intrigue. At its summit, you'll find an abandoned military base, adding a unique, albeit eerie, point of interest to the site. This historical aspect complements the area's natural beauty and challenging terrain.
The region offers diverse hiking opportunities. Puerto de las Estacas de Trueba serves as a starting point for several routes, including one leading to the source of the Trueba River. La Sía Pass is also a key starting point for numerous hiking excursions, providing access to areas like the source of the Asón River. For more detailed hiking routes, you can explore the Hiking around Merindad De Montija guide.
The Zalama Summit, while not a pass, is a significant high point that marks a unique geographical landmark. It reaches an elevation of 1,343 meters and its summit is the convergence point of three provinces: Vizcaya, Burgos, and Cantabria. This is commemorated by a monolith from 1886, offering a distinct geographical experience.
The best time to visit generally depends on your activity. For cycling and hiking, spring through early autumn offers pleasant weather. However, some passes like Puerto de La Sía can be subject to closures due to snow or fog in winter, so it's advisable to check local conditions if planning a winter visit.
Puerto de las Estacas de Trueba is renowned for its authentic and serene natural beauty, featuring endless meadows, grazing cows, and traditional 'casonas pasiegas' (Pasiego houses). Visitors can also explore nearby charming villages like Vega de Pas and Espinosa de los Monteros, known for their traditional gastronomy and architecture, adding a cultural dimension to your visit.
Experienced cyclists will find significant challenges in Merindad de Montija. The ascent to Picón Blanco is exceptionally demanding, with gradients often exceeding 10% and reaching up to 17-18% in some sections. La Sía Pass also presents a challenging ascent, particularly on the Cantabrian side. You can find more challenging routes in the Road Cycling Routes around Merindad De Montija guide.
Yes, near the Zalama Summit, you can discover a rare peat bog plant community, which provides an interesting ecological feature. The surrounding areas of passes like Puerto de las Estacas de Trueba are also characterized by beautiful glacial valleys, offering diverse natural landscapes.
Visitors frequently highlight the stunning panoramic views, the challenging yet rewarding cycling and hiking opportunities, and the serene natural beauty of the region. The unique blend of natural landscapes, from endless meadows to high-altitude summits, combined with the cultural charm of nearby villages, makes the area particularly appealing.
While many passes offer challenging ascents, Puerto de las Estacas de Trueba provides a comfortable and incredibly scenic drive with recently improved roads, making it accessible for those seeking a more relaxed experience focused on enjoying the views and natural beauty without extreme physical exertion. Its surrounding area is ideal for gentle walks.
Merindad de Montija offers several gravel biking opportunities. While specific routes directly over the passes might vary, you can find a range of gravel biking tours in the broader area. For detailed routes and options, refer to the Gravel biking around Merindad De Montija guide.


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