Best canyons around Armallones are found within the Alto Tajo Natural Park, a region known for its dramatic river gorges and unique geological formations. The area is characterized by the Tajo River, which has carved deep canyons with vertical walls over time. This natural landscape offers diverse environments, from impressive rock formations to riverine ecosystems. Armallones provides opportunities for exploring geological marvels and engaging in outdoor activities.
Last updated: June 20, 2026
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This descending valley, which runs alongside the Tagus River for many kilometres, is full of unique and unrepeatable corners, due to the capricious formations that occur every few metres.
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It is a narrowing of the lateral cliffs of the Tagus River. It is also known as the Gate of the Alto Tajo. From this place upwards begins the Alto Tajo Natural Park.
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A curious place where the collapse of the side cliffs, as a consequence of the Lisbon earthquake, closed the Tagus River for several days, interrupting the flow of water. Today, there are still a large number of huge rocks at the bottom of the Tagus. It is worth visiting.
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There is a parking very close so you don't have to walk far. I think it's more fun to include in a long hike, but the views are good either way. From here you can tour the entire valley and down the river. It's quite spectacular and there are several map boards that explain what you're seeing.
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One of the most impressive enclaves in the Alto Tajo protected area. In this place, the force of the Tagus River is revealed, which has eroded for thousands of years a deep canyon with vertical walls in which numerous birds nest.
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This section of the well-known "Montañas vacías" bikepacking route runs along the banks of the Tagus River through an incomparable landscape setting. Beautiful views in every corner of the river and the impressive gorges that it has formed over thousands of years. A unique and incomparable place.
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The Alto Tajo protected area is a place with little crowds but of great scenic value. A clear example is the Hundido de Armallones area, surrounded by an impressive landscape that also offers some natural pools on the Tagus riverbed. They are ideal for cooling off in the summer months. It can be accessed from the west bank, although the views from this side are equally wonderful.
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in pursuit of the tajo a magnificent track
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The canyons around Armallones, particularly the Hundido de Armallones, are renowned for their dramatic river gorges carved by the Tajo River. They feature impressive vertical walls, significant geological formations like a large recumbent fold, and evidence of a massive 16th-century rockfall that temporarily dammed the river. The descending valley of the Tajo River is full of unique and irreplicable formations, making it a place of great scenic and geological value.
The canyons are a haven for diverse flora and fauna. The unique microclimate supports a mix of Iberian-North African, Eurosiberian, and Mediterranean plant species. You can spot rupicolous birds of prey such as Bonelli's eagle, Egyptian vulture, griffon vulture, and peregrine falcon on the vertical rock faces. The riverine forest is home to otters, warblers, kingfishers, and common trout.
Yes, the Tajo River within the canyons forms beautiful natural pools, ideal for cooling off during the summer months. The waters are often described as crystalline and emerald green. The Hundido de Armallones area, in particular, offers some natural pools on the Tagus riverbed that are perfect for this.
There are excellent hiking opportunities, ranging from moderate to difficult. A popular choice is the 8 km (round trip) trail, often starting from Ocentejo, which offers spectacular aerial views of the river before descending to its level. The Hundido de Armallones area has a challenging loop route providing extensive views. You can find more hiking trails, including the "Hundido de Armallones Loop" and others like "Pico del Alar" or "Rambla del Avellano," on the Hiking around Armallones guide.
While some trails can be challenging, there are family-friendly options. For instance, the Zaorejas Viewpoint is easily accessible with nearby parking and offers spectacular views of the valley and river, making it suitable for families. Some hiking routes are also manageable for various activity levels.
The summer months are particularly appealing for visiting the canyons, especially if you plan to enjoy the natural pools for swimming and cooling off. However, the area offers beautiful scenery for hiking and exploring throughout spring and autumn as well, when temperatures are milder.
Excellent viewpoints are plentiful. The Zaorejas Viewpoint offers panoramic views of the entire valley and the Tajo River. The Tajo River Suspension Bridge also provides great perspectives of the gorge. Additionally, many hiking trails, such as those around Hundido de Armallones, offer spectacular aerial views before descending to river level.
The Hundido de Armallones is the most prominent canyon in the area, carved by the Tajo River. Its significance lies in its dramatic vertical walls, geological history (including a large recumbent fold), and a notable 16th-century rockfall that gave it its name ('Hundido' means sunken). It's also known for its beautiful natural pools and rich biodiversity, making it a key natural monument within the Alto Tajo Natural Park.
Yes, beyond the Hundido de Armallones, the area boasts other impressive natural features. The La Tormellera Gorge, also known as the Gate of the Alto Tajo, marks the beginning of the Natural Park. Another highlight is Peña del Arco, an impressive natural arch formation with surrounding limestone walls and unique mushroom-shaped karstic formations called 'tormos'.
Absolutely. The area is popular for cycling, with options for both mountain biking and traffic-free rides. The Trail along the Tajo River is part of the well-known "Montañas vacías" bikepacking route, offering beautiful views. You can explore various routes, including those around Hundido de Armallones, by checking the MTB Trails around Armallones and Traffic-free bike rides around Armallones guides.
Visitors are consistently impressed by the stunning natural landscapes and the powerful presence of the Tajo River. Many highlight the unique and unrepeatable corners formed by the river's erosion, the impressive gorges, and the opportunity to cool off in the natural pools during summer. The area is praised for its scenic value and the sense of being surrounded by an untouched, beautiful environment.


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