Best canyons around Onís are found within a municipality in Asturias, Spain, serving as a gateway to the Picos de Europa National Park. This area is characterized by dramatic landscapes, including several impressive gorges and canyons. The region offers diverse terrain, from deep river-carved gorges to limestone massifs. It is a notable location for exploring natural geological formations.
Last updated: June 20, 2026
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The Bolín Bridge, in Posada de Valdeón (León), is a small but significant mountain bridge that is part of several hiking trails in the Picos de Europa, especially as an access route to the challenging Canal de Trea. It is located on the outskirts of Posada de Valdeón, towards the Mirador del Tombo and the beginning of the Canal de Trea. It is close to Fuente Prieta and areas such as El Agua Las Huertas, in a natural setting of great beauty.
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A fantastic swimming spot in the VERY cold Cares River. Highly recommended, especially after a hike!
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Known as the "Garganta Divina", this route between Cain (Leon, Castile and Leon) and Poncebos (Asturias) offers you the opportunity to walk between mountains that rise more than 2,000 meters above the bottom of the imposing gorge dug by the Cares River. You will see mythical peaks, cross bridges that connect both sides of the gorge, go through about 70 tunnels carved into the rock and witness an amazing natural spectacle.
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Known as the "Garganta Divina", this route between Cain (Leon, Castile and Leon) and Poncebos (Asturias) offers you the opportunity to walk between mountains that rise more than 2,000 meters above the bottom of the imposing gorge dug by the Cares River. You will see mythical peaks, cross bridges that connect both sides of the gorge, go through about 70 tunnels carved into the rock and witness an amazing natural spectacle.
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The Cares Gorge (Garganta Divina) is exceptionally popular, known for its dramatic trail carved into limestone cliffs. Visitors particularly enjoy the initial 6 kilometers from Cain, which offer spectacular views and nature. Another unique feature is the Dwarves' Tunnels on the Cares Trail, a series of 71 man-made tunnels along the route.
Yes, the Xanas Gorge, often called the 'mini Cares,' offers a beautiful and less crowded hiking experience suitable for a wider range of ages and physical conditions. Its 7.6 km round trip trail features tunnels, bridges, and rich vegetation, making it an excellent alternative for families seeking stunning scenery in a tranquil setting.
You will encounter deep river-carved gorges, towering limestone massifs, and dramatic cliffs. The Cares Gorge, for instance, features a path hewn into sheer rock faces with dizzying views of the Cares River below. You can also find crystal-clear streams, like one near the Cares River where you can take a dip on warmer days, and rich vegetation including beech, chestnut, birch, and hazel trees in areas like the Xanas Gorge.
The best time to visit the canyons for hiking and canyoning is generally during the warmer months, from late spring to early autumn. This period offers more stable weather conditions, making trails more accessible and water activities more enjoyable. However, some gorges like Vallegón Gorge have year-round water flow, making them suitable for canyoning even outside peak season.
Beyond hiking, the region is excellent for canyoning. Vallegón Gorge is a popular spot for low-to-intermediate canyoning, featuring natural water slides, jumps, and abseiling. For more challenging experiences, Viboli Gorge offers advanced canyoning with narrow passages, high jumps, and multiple rappels. You can also find various hiking routes, mountain hikes, and gravel biking trails in the wider Onís area.
Yes, for experienced adventurers, Viboli Gorge in the Ponga Natural Park offers a more challenging canyoning experience, rated as level 3 difficulty. It features narrow passages, imposing chutes, natural slides, high jumps (up to 6 meters), and multiple rappels ranging from 8 to 24 meters, requiring prior canyoning experience.
The Cares Gorge trail, while dramatic, has a relatively flat gradient for much of its length, making it accessible to most hikers. It was originally built as a maintenance path for a hydroelectric plant. The path includes tunnels carved into the rock and bridges. Access points are typically from Poncebos in Asturias or Caín in León. It's a well-traveled path, so expect other hikers, especially during peak season.
The Xanas Gorge is often less crowded than the Cares Gorge, offering a similar spectacular hiking experience in a more tranquil setting. For canyoning, Vallegón Gorge is a popular but accessible option, and its year-round water flow makes it a consistent choice. Viboli Gorge, being more challenging and often requiring authorized active tourism companies, tends to have more restricted access, which helps preserve its pristine character.
The duration of canyoning experiences varies by gorge and operator. For example, the upper section of Vallegón Gorge, a popular choice for beginners, is approximately 1300 meters long with a 140-meter vertical drop, which can take a few hours to navigate depending on group size and pace. More challenging gorges like Viboli will likely require a half to full day.
The Cares Gorge offers breathtaking views at every turn, with its path hewn into sheer cliffs overlooking the river. The Bolín bridge on the Cares path is a landmark that provides spectacular panoramic views. The Xanas Gorge also features impressive vertical drops of almost five hundred meters, offering stunning vistas of the sculpted landscape.
The dramatic landscapes of the Picos de Europa, including its canyons, are home to diverse wildlife. Along trails like the Cares Gorge, you might spot wild mountain goats (chamois) navigating the steep cliffs. The rich vegetation in areas like the Xanas Gorge also supports various bird species and other small animals.


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