Best natural monuments around Quirós are found within a landscape largely encompassed by the Las Ubiñas-La Mesa Nature Reserve in Asturias, Spain. This region features rugged terrain, mountains, and diverse flora and fauna. Quirós offers a range of natural features, including gorges, ancient trees, and expansive natural reserves. The area provides opportunities to explore unique geological formations and varied ecosystems.
Last updated: July 1, 2026
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The pass is now paved and can be driven on by car.
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During the mining era, this pass served as a discreet link between mines on either side, and minimal traces of old cart and mule traffic remain, though they don't coincide with the current road. From above, the wind is almost constant, and the view towards the Saliencia lakes has that air of a "natural viewpoint" before the term even existed. It's perfect to mark on Komoot as a key point on your route due to its spaciousness, its somewhat hidden history, and its character as a natural border.
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Upon reaching the summit, you don't arrive at a village or a tourist center, but rather at a kind of natural balcony overlooking the Lena mountain passes, which gives a strange feeling, as if you've stepped onto an empty stage. And on clear days, the wind is louder among the mountain passes than any car, because traffic is minimal.
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For decades, La Cubilla was practically a ghost town: a road built to connect mining valleys, used more by livestock farmers and scattered trucks than by travelers. This lack of traffic left a remarkably clean route, free of curves, absurd straights, and modern widenings: pure mountain design from another era. That's why many cyclists say it "looks more like an Alpine pass than a Cantabrian one," with those giant limestone walls silently accompanying you.
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The La Cubilla mountain pass is located at an altitude of 1,683 meters, on the border between Asturias and León. Its rugged terrain and the beauty of its surroundings have earned it the title of stage finisher of the Vuelta a España, making it one of the most iconic climbs among cyclists.
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Puerto de Ventana is a mountain pass located in the Cantabrian Mountains, between the Principality of Asturias and the province of León. It lies at an altitude of 1,587 meters and connects the municipality of San Emiliano in León with the Asturian municipality of Teverga. From the pass, you can enjoy a breathtaking view of the San Emiliano Valley, known as Babia de Yuso.
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Beautiful port with very very hard climbs on both sides.
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Impressive views, both for Leonese lands and Asturian lands. The climbs on both slopes are very difficult, but spectacular, and are worth it.
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Quirós is rich in diverse natural features. You can explore spectacular gorges like the Desfiladero de Peñas Juntas on the Senda del Oso, where the rock walls appear to touch. The region also boasts impressive mountain passes such as La Cubilla Pass, offering magnificent landscapes, and the ancient Ventana Pass, known for its breathtaking views of the San Emiliano Valley. Additionally, you'll find unique geological formations like the Huerta Cave, one of Asturias' largest cavities, and the serene Guanga Waterfalls.
Yes, the Desfiladero de Peñas Juntas on the Senda del Oso is categorized as family-friendly. The Senda del Oso itself is a popular cycling route suitable for all ages, following an old mining train path through gorges, bridges, and tunnels. The Ruta de las Xanas, while not explicitly listed as family-friendly in the highlights, is a well-known and picturesque trail through a gorge that many families enjoy.
The area around Quirós offers a wide range of outdoor activities. You can enjoy extensive cycling routes, including those that pass through natural monuments like the Senda del Oso. For hiking, there are trails ranging from easy to difficult, such as the 'Senda del Oso: Valdemurio Reservoir Loop' or the 'Royal Trail of Puerto de Ventana'. Mountain biking is also popular, with routes like the 'Ventana Pass and Senda del Oso Loop'. You can find more details on these activities and routes in the cycling guide, hiking guide, and MTB trails guide for Quirós.
The Las Ubiñas-La Mesa Nature Reserve, which encompasses much of Quirós, is a beautiful destination year-round. However, for hiking and cycling, spring and autumn generally offer the most pleasant weather with milder temperatures and vibrant landscapes. Summer is also popular, especially for higher altitude routes, but can be warmer. Winter can be beautiful for snowy landscapes, but some higher passes and trails might be less accessible.
Yes, Quirós is home to the Ventana Pass, a historically significant mountain pass that has served as a passage between León and Asturias for centuries. Additionally, the Teixo Milenario de Bermiego (Millenary Yew of Bermiego) is an ancient yew tree declared a natural monument, standing as a testament to the area's enduring natural heritage and often associated with local folklore.
The Las Ubiñas-La Mesa Nature Reserve, where many of Quirós's natural monuments are located, is a Biosphere Reserve known for its diverse flora and fauna. While specific wildlife sightings are never guaranteed, the rugged terrain and protected ecosystems offer opportunities to observe various species in their natural habitat. Keep an eye out for local birds, mammals, and unique plant life, especially in quieter areas and during dawn or dusk.
The terrain around Quirós is largely rugged and mountainous, characteristic of the Cantabrian Mountains and the Las Ubiñas-La Mesa Nature Reserve. You can expect varied elevations, from the deep gorges of the Ruta de las Xanas and Desfiladero de Peñas Juntas to the high mountain passes like La Cubilla Pass and Ventana Pass. Trails can range from relatively flat, repurposed railway paths like parts of the Senda del Oso, to challenging ascents and descents in the higher reaches of the reserve.
Many natural monuments in Quirós offer stunning photographic opportunities. The Desfiladero de Peñas Juntas on the Senda del Oso is highly recommended for its unique rock formations and the dramatic narrowness of the gorge. The Ruta de las Xanas is also a popular spot for photographers due to its spectacular gorge and the enchanting atmosphere created by the stream and rock formations. Mountain passes like La Cubilla Pass provide expansive panoramic views, ideal for landscape photography.
Visitors frequently praise the breathtaking scenery and unique natural beauty. For instance, the Desfiladero de Peñas Juntas is described as an 'impressive gorge' and a 'spectacular passage'. The La Cubilla Pass is noted for its 'magnificent landscapes', and the Huerta Cave area is called a 'spectacular ravine'. Many appreciate the opportunity to connect with the pristine natural environment of Asturias.
Absolutely. The Desfiladero de Peñas Juntas on the Senda del Oso is renowned for its dramatic gorge where the walls appear to almost touch. The Ruta de las Xanas also features a spectacular gorge carved by a stream, with visible stalactites that are remnants of ancient caves. The Huerta Cave itself is a significant geological feature, being one of the largest Asturian cavities.
Yes, for easier walks, consider sections of the Senda del Oso. While some parts are intermediate, the 'Senda del Oso: Valdemurio Reservoir Loop' is an easy hiking route. The Ruta de las Xanas, while having some elevation, is generally considered accessible and offers a rewarding experience without extreme difficulty. These paths allow you to enjoy the natural beauty without requiring advanced hiking skills.
While specific public transport routes directly to every natural monument might be limited, the region of Quirós is generally accessible. For popular areas like the Senda del Oso, there might be bus services to nearby towns such as Proaza or Trubia, from where you can access the trails. It's advisable to check local bus schedules for the most up-to-date information when planning your visit.


Extend your search for the best caves by checking out these guides of the top ones around Quirós: