Best lakes around Serra da Estrela are found within Portugal's highest mountain range, a region shaped by glacial activity. This area features a diverse landscape of granite formations, valleys, and high-altitude plateaus. The lakes here, including both natural and artificial reservoirs, play a role in hydroelectric power generation and offer insights into the region's geomorphology. Serra da Estrela provides a setting for exploring unique water features and mountain environments.
Last updated: October 16, 2026
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Covão dos Conchos is an artificial lagoon located in the Serra da Estrela Natural Park, Portugal, near the mountain village of Sabugueiro. Covão dos Conchos became famous for its bell-mouth spillway[1]. The spillway was built in 1955 to allow water to be transferred from the Ribeira das Naves River to Lagoa Comprida. It is part of the Serra da Estrela Hydroelectric System. This science fiction-style spillway became famous when photographs of the hole went viral on social media in 2016. Over the past 60 years, the growth of vegetation at the funnel's mouth has created extraordinary biodiversity and increased its ethereal allure. It is 4.6 meters high and 48 meters in circumference. The tunnel that collects the water is 1,519 meters long.
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Next to the Nave de Santo António, the Covão do Ferro or Padre Alfredo dam, inaugurated in 1956, uses a glacial cirque and collects water from the Alforfa stream. It was commissioned by Father Alfredo to supply electricity to the wool industry in Unhais da Serra. Unhais da Serra can be seen in the background.
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Located within the Planalto Superior biogenetic reserve, the Rossim Valley is a unique location of great scientific, environmental, and scenic value that deserves to be protected and enhanced. Although it is an artificial lake, over time, conditions have been created that have transformed this area into an excellent leisure and recreation area that attracts countless tourists. The Vale do Rossim recreation center is located at an average altitude of 1,437 meters. Before the dam was built, it was one of the best high-altitude pastures in the municipality of Gouveia. The area has almost always been frequented by transhumance herds, flocks that gathered here from São João to the Sr. do Calvário festivities in August.
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Thanks for sharing.🙏
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The second half (from Covão dos Conchos) is impassable and in some places only possible with orientation using stone markers (stacks). Nevertheless, it's a beautiful hike with views.
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At over 1,400 meters above sea level, the Rossim Valley Reservoir is a haven of granite, pine trees, and crystal-clear waters in the heart of the Serra da Estrela Mountains. It's the perfect setting for strolls, summer swims, and admiring nature in all its splendor, one of Portugal's highest jewels.
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Hiking in the Serra da Estrela is always pleasant, with stunning scenery and spectacular trails. 👍
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This restaurant and bar is located right on the lake (there's nothing else in the area), and it's nice to sip a nice beer 🍺 and grab a bite to eat after a sunny day or a nice hike. Also... For those who want to stay longer, there's the Vale do Rossim Eco Resort: camping, equipped yurts, or wooden cabins, with the option of half-board at a reasonable price at this lakeside restaurant. Breakfast is good, dinner is very simple, but all drinks are included, including a bottle of wine 🍷 🤪.
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The region is rich in unique natural features. You can visit Long Lake, the largest reservoir of glacial origin with visible glacial scars. Another highlight is Covão dos Conchos Trail, famous for its bell-mouth spillway, a unique blend of human engineering and natural beauty. Don't miss Poço do Inferno, a dramatic waterfall forming a small lagoon, which can even freeze in colder winters.
Yes, several spots are great for families. Vale do Rossim Reservoir is ideal for leisurely strolls, summer swims, and activities like kayaking and pedaloes. The Covão dos Conchos Trail is also listed as family-friendly, offering an engaging hike to a unique natural monument.
The Serra da Estrela region offers a variety of hiking experiences. You can find trails ranging from easy walks to more challenging routes. For instance, the 8 km (round trip) hike from Long Lake to Covão dos Conchos is very popular. For more options, explore the waterfall hikes around Serra da Estrela, which include routes like the 'Poço do Inferno Route'.
Yes, wild swimming is possible in several locations. Vale do Rossim Reservoir is a popular spot for summer swims. Additionally, you can find natural swimming pools at Poço da Broca de Serapitel and near the waterfall and natural swimming pool in Parque Natural da Serra da Estrela.
The best time to visit depends on your preferred activities. Summer is ideal for swimming, sunbathing, and enjoying the fresh mountain air, especially at Long Lake and Vale do Rossim Reservoir. In colder winters, the Poço do Inferno waterfall can freeze, creating a spectacular icy scene, offering a different kind of beauty.
Yes, there are options available. Near Vale do Rossim Reservoir, you'll find an eco-resort for overnight stays and the Vale do Rossim River Beach Restaurant. For other areas, it's advisable to check local listings for restaurants and accommodation, particularly around the more frequented lakes like Long Lake.
Visitors frequently praise the stunning natural landscapes, the fresh mountain air, and the unique geological features. Many enjoy the tranquility and the opportunity for nature walks, photography, and the refreshing experience of swimming in the clear waters. The unique blend of natural beauty and human engineering, like the spillway at Covão dos Conchos, is also a major draw.
While not entirely hidden, Covão do Ferro Lake offers a serene experience, situated next to Nave de Santo António and utilizing a glacial cirque. Another natural gem is Lagoa Escura, known for its deep waters, peatland, and local legends, offering a mystical side of Serra da Estrela with minimal human disturbance.
The region offers various cycling opportunities. You can find gravel biking routes, such as those listed in the Gravel biking around Serra da Estrela guide. For more challenging rides, explore the MTB Trails around Serra da Estrela, which include routes like the 'Serra da Estrela: Manteigas and Torre Loop'.
While specific public transport routes directly to all lake access points can be limited, buses and trains serve the broader Serra da Estrela Natural Park region. It's recommended to check local transport schedules from nearby towns like Seia or Covilhã, and plan for potential taxi services or personal transport for the final leg to more remote lake areas.
Many trails in the Serra da Estrela Natural Park are generally dog-friendly, allowing you to explore with your canine companion. However, it's always best to keep dogs on a leash, especially in protected areas or where livestock might be present, and to ensure you clean up after them. Always check specific trail regulations before you go.
Given the varied terrain and altitude, it's advisable to wear good walking shoes with ankle support, as many paths, like the one to Covão dos Conchos, can have loose stones. Layered clothing is recommended, as temperatures can change quickly, especially at higher altitudes. Sun protection (hat, sunscreen) is also essential, as many trails offer little shade.


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