Lakes around Collado Hermoso are primarily reservoirs and natural pools located within the Sierra de Guadarrama, offering recreational opportunities and scenic landscapes. This area, while not featuring prominent natural lakes directly within the town, provides access to significant water bodies. These locations serve as popular spots for outdoor activities and contribute to the natural appeal of the region. They are known for their scenic beauty and opportunities for exploration.
Last updated: July 4, 2026
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Beautiful viewpoint of the Pinilla reservoir
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beautiful walking area with beautiful views
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especially beautiful in Spring, with the thaw.
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A haven of Peace to sit on a stone and let the seconds, minutes and even hours pass by. In addition, the lagoons are surrounded by an extraordinary landscape of meadows, rock circles and grazing cattle.
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The Pinilla reservoir is located in the upper reaches of the Lozoya River, in the north of the Community of Madrid (Spain). Located in the heart of the Sierra de Guadarrama, it has been the head reservoir of the basin since the moment it was inaugurated in 1967. It is part of the Canal de Isabel II network, a company that supplies drinking water to the capital of Spain and a good part of of the Community of Madrid.
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Reservoir located in a very picturesque place, so it is worth going through the dam and enjoying the landscape.
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The Pirón River reservoir is one of the many reservoirs found throughout the Sierra de Guadarrama. This, despite its size, is nestled in a beautiful landscape surrounded by pine trees with views of the peaks and the Castilian plateau.
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The viewpoint has incredible views, not only of the reservoir but also of Guadarrama and Peñalara in the background. A quiet place, full of peace, and a good place to rest.
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For family-friendly outings, the Pinilla Reservoir Viewpoint offers easy paths around the reservoir with picturesque landscapes. The Pirón Reservoir is also noted as family-friendly, nestled in a beautiful landscape with views of the peaks.
The region offers diverse natural features. You can find glacial lagoons like the Hoyos de Pinilla, which are remnants of glacial events in the Sierra de Guadarrama. The Lagunillas of the Sierra de Guadarrama provide a peaceful setting with meadows, rock circles, and grazing cattle. Reservoirs like Pinilla and Pirón are surrounded by pine forests and offer panoramic views of the mountains and the Castilian plateau.
Yes, many of the reservoirs offer walking opportunities. Around the Pinilla Reservoir, there's a quiet, easy path that goes completely around the reservoir, offering unique landscapes depending on the season. For more extensive outdoor activities, you can explore various routes in the area. Check out the guides for MTB Trails around Collado Hermoso, Gravel biking around Collado Hermoso, and Road Cycling Routes around Collado Hermoso for detailed trail information.
The best time to visit depends on your interests. For the glacial lagoons like Hoyos de Pinilla, spring is ideal during the thaw when the water levels are higher and the landscape is especially beautiful. Reservoirs like Pinilla offer picturesque views year-round, with each season presenting a different charm. Warmer months are generally better for water-based activities.
Visitors frequently appreciate the serene atmosphere and scenic beauty. The Pinilla Reservoir Viewpoint is praised for its panoramic views. The Lagunillas of the Sierra de Guadarrama are described as a 'haven of peace' perfect for quiet contemplation amidst extraordinary landscapes. The Pirón Reservoir is valued for its picturesque setting surrounded by pine trees.
While the primary bodies of water are reservoirs, the wider Sierra de Guadarrama region offers natural swimming spots. Poza Charca Verde, a 'green river pool,' is a popular wild swimming location known for its deep, cool water, smooth boulders, and breathtaking views over large pine forests. It's an atmospheric spot with unique rock formations.
The Pinilla Reservoir is a significant water body in the upper reaches of the Lozoya River, part of the Canal de Isabel II network supplying drinking water to Madrid. It was inaugurated in 1967. From the Pinilla Reservoir Viewpoint, you can enjoy panoramic views, and a quiet, easy path allows you to walk around the entire reservoir, offering varied landscapes throughout the year.
The Hoyos de Pinilla are notable for being living remnants of glacial events that shaped the Sierra de Guadarrama mountains. While not historical in the traditional sense, these lagoons offer a glimpse into the region's ancient geological past. The reservoirs themselves, like Pinilla and Pirón, are man-made structures that have become integral parts of the landscape.
The Ceguilla Dam is a smaller dam that collects water from the surrounding hillsides. It plays a role in supplying water to nearby communities.
Beyond those directly highlighted, the wider area includes the Valmayor Reservoir near Collado Villalba, known for its scenic surroundings and granite slabs when water levels are high. The Air Force Reservoir, also near Collado Villalba, offers striking views, including peaks like Maliciosa and Bola del Mundo on clear days.
The Hoyos de Pinilla are glacial lagoons located in the Sierra de Guadarrama. They are considered a jewel of the region, showcasing the effects of ancient glacial events. Their water level varies with the season and rainfall; they can be frozen in winter and reduced to small pools in summer. The best time to visit is in spring, during the thaw, when they are especially beautiful.


Still not found your perfect lake around Collado Hermoso? Check out the guides of these regions to see even more beautiful places.