Best attractions and places to see around Pantano de Valmayor, a significant natural reserve in the province of Madrid, offers a diverse range of attractions. The area is centered around the Valmayor Reservoir, the second-largest in the Community of Madrid by water storage capacity, nestled amidst lush green forests. This region combines natural features with opportunities for various outdoor activities and cultural insights. Visitors can explore a variety of attractions, from the expansive reservoir itself to unique geological formations and scenic trails.
Last updated: May 9, 2026
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Highlight • River
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On November 26, 2025, the water covered many areas that are normally passable. You had to "climb" several rocks to get around the reservoir. This section was especially tricky when descending, and even more so if you were alone.
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At the end of November 2025, the reservoir's water level was thankfully very high. The vegetation had grown considerably, and the only way across was at a point where you had to wade through the water. The water was freezing!
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Paths and cattle trails very suitable for bike rides.
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Today, February 9, after the rains, the reservoir is higher, although you can still cross without climbing the rock, with a little care you won't get wet.
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As of January 1, 2025, the water will no longer cover the path that runs under the granite stone and it can be passed through without any complications.
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The passage through the Arroyos dam is closed, we will have to go all the way around the tail of the reservoir to another small dam in ruins.
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If the reservoir flow is high, you have to walk and almost climb this rock. Easy, once you've done it.
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If there is a lot of water like this time, there is no way to pass through the dam.
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The centerpiece is the Valmayor Reservoir, one of the largest in the Community of Madrid. It's surrounded by lush green forests and boasts diverse ecosystems with riparian vegetation, holm oak groves, and a variety of flora. The area is also excellent for birdwatching, with many aquatic and migratory birds.
Yes, you can find the Stone slab above the Valmayor reservoir, a notable granite slab that can be a challenging but rewarding feature for hikers and cyclists, especially when water levels are high. Additionally, the "Ruta de los Miradores" offers panoramic views of the reservoir and surrounding landscapes.
The reservoir is ideal for various outdoor activities. You can enjoy water sports like sailing, paddle surfing, kayaking, and rowing. Hiking and cycling are very popular, with numerous trails catering to different skill levels. Fishing is also permitted in designated areas with prior permits.
Absolutely. Many trails around the reservoir, such as the Arroyos and Valmayor Trail, are considered family-friendly. The reservoir itself, including the Valmayor Reservoir, offers opportunities for easy walks and enjoying nature. There are also picnic and recreational areas, like the Área Recreativa La Ermita, perfect for families.
While the reservoir itself submerged old roads and a 17th-century granite cross during its construction, you can visit the late 19th-century Ermita de Nuestra Señora de la Soledad near the reservoir, which offers a tranquil spot. The impressive Valmayor Dam, completed in 1976, is also a significant engineering feat with historical context. The UNESCO-listed Royal Monastery and Palace of El Escorial and Valle de Los Caídos are also nearby.
Yes, the area offers a variety of hiking trails. For easy walks, you can explore routes like the Valmayor Reservoir loop from Colmenarejo or the Valmayor Hermitage loop from La Pizarrera. More challenging routes are also available, including those that navigate the granite slab when water levels are high.
Yes, cycling is a popular activity with numerous trails. You can find routes like the Albergue Ruta de Amigos – Hermitage loop from Principal - Parque Infantil or more challenging options such as the Puerto de Malagón – Fuente de la Concha loop. The trails offer scenic views of the reservoir and surrounding nature.
The River crossing at Valmayor Reservoir offers a simple route with unique views of dry fallen trees. Depending on the time of year and water levels, you might need to cross a small stream, so bringing spare socks is advisable. It's a picturesque spot, especially on cloudy days.
Visitors frequently praise the natural beauty and tranquility of the area. Many appreciate the diverse trails for hiking and cycling, often highlighting the scenic views of the reservoir. The unique geological features, like the granite slab, and the opportunity for water sports also receive positive feedback from the community.
Yes, the reservoir is an excellent location for birdwatching. Its diverse ecosystems attract a wide variety of bird species, including ducks, storks, herons, cormorants, and other aquatic and migratory birds, making it a rich habitat for avian enthusiasts.
When encountering the Stone slab above the Valmayor reservoir, especially if water levels are high, it can be challenging. If you are cycling clockwise, you'll need to carefully un-climb it, and it's advisable to be accompanied to safely lower your bike. If going counterclockwise, climbing it can be more difficult as the slab is smooth with few grip points.
For easy hiking routes, you can explore the options listed in the Easy hikes around Pantano de Valmayor guide. These include loops like the Valmayor Reservoir – Valmayor Reservoir loop from Dehesa de las Latas and the Aulencia Dam loop from Prado Gómez, which are suitable for a relaxed outdoor experience.


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