Top 19 Lakes in the Serra da Estrela Mountains
Best lakes in the Serra da Estrela Mountains are primarily of glacial origin, situated at high altitudes in Portugal's largest mountain range. This region is characterized by its unique geological formations, including wide depressions and glacial scars, making it a significant water mirror. Many lakes serve as important water reservoirs for hydroelectric generation. The natural landscape offers diverse opportunities for exploration and appreciating the region's geological importance.
Best lakes in the Serra da Estrela Mountains
- The most popular lakes is…
Last updated: May 15, 2026
Covão dos Conchos Trail
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Long Lake
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Vale do Rossim Reservoir
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Vale do Rossim River Beach Restaurant
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Poço da Broca de Serapitel
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Hidden cascade at Poço do Inferno
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Covão do Ferro Lake
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Lagoa do Peixão
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Trail to the Upper Lakes, Serra da Estrela Natural Park
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Waterfall and natural swimming pool in Parque Natural da Serra da Estrela
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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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Frequently Asked Questions
What are the most notable lakes to visit in the Serra da Estrela Mountains?
Among the most notable lakes are Long Lake (Lagoa Comprida), the largest water reservoir and a starting point for trails, and Vale do Rossim Reservoir, known for its clear waters and being the highest river beach. Another unique spot is Covão dos Conchos Trail, famous for its bell-mouth spillway, accessible via a scenic 5 km trail from Long Lake.
Are there family-friendly lakes or activities in the Serra da Estrela Mountains?
Yes, several lakes offer family-friendly experiences. Vale do Rossim Reservoir is ideal for picnics, sunbathing, and gentle strolls. The trail to Covão dos Conchos is also considered family-friendly, though good shoes are recommended due to some scree sections.
What kind of outdoor activities can I do near the lakes?
The lakes in the Serra da Estrela Mountains are excellent for various outdoor activities. You can enjoy hiking, with trails ranging from easy to difficult, such as the Faias Trail or the more challenging Covão dos Conchos Trail. Mountain sports like canoeing and rappelling are popular at Vale do Rossim Reservoir, and many spots are great for photography and nature observation.
Can I swim in the lakes or waterfalls in Serra da Estrela?
Yes, swimming is possible in several locations. Long Lake allows swimming, and Vale do Rossim Reservoir is known for its river beach, though the water remains very cold even in summer. The lagoon at Poço do Inferno and Poço da Broca Waterfall also offer cold, refreshing waters for bathing, especially recommended in summer.
What is the best time of year to visit the lakes in Serra da Estrela?
The best time to visit depends on your preferred activities. Summer (June to August) is ideal for swimming, picnics, and enjoying mountain sports, though the water remains cold. Spring and autumn offer pleasant temperatures for hiking and enjoying the scenic landscapes without the summer crowds. In winter, higher altitude lakes like Long Lake can be covered in ice, offering a different, stark beauty.
Are there any unique natural features or landmarks among the lakes?
Absolutely. The most famous unique feature is the bell-mouth spillway at Covão dos Conchos, an engineering marvel that looks like a natural sinkhole. The region is also characterized by its glacial origin, with visible glacial scars along the banks of lakes like Long Lake. Waterfalls like Poço do Inferno also create impressive natural lagoons.
Where can I find well-preserved glacial lakes in the region?
The Serra da Estrela Mountains are home to approximately 25 glacial lakes. Long Lake is a prime example, occupying a wide glacial depression with visible glacial scars. Lagoa Escura is also noted for being impressively well-preserved and part of the network of high-altitude glacial lagoons.
Are there any hidden gems or less-known lakes worth exploring?
While popular spots are well-loved, exploring the 'Route of the Lakes' starting from Long Lake can lead you to less-frequented spots like Lagoa Redonda and Laguna Seca (which can be dry by late August). Covão do Boeiro, a large natural amphitheater with a seasonal lagoon, also offers stunning and imposing landscapes away from the main crowds.
What kind of hiking trails are available around the lakes?
The region offers a variety of hiking trails. You can find easy walks suitable for families, such as those mentioned in the Easy hikes in the Serra da Estrela Mountains guide. For more experienced hikers, there are moderate to difficult trails, including the Covão dos Conchos Trail and other routes detailed in the Hiking in the Serra da Estrela Mountains guide. Many trails offer scenic views of the mountain's rocky landscape and connect various lakes.
What do visitors particularly enjoy about the lakes in Serra da Estrela?
Visitors frequently praise the breathtaking natural beauty and the unique geological formations. The surreal appearance of Covão dos Conchos is a major draw. Many appreciate the tranquility, the crystal-clear waters of places like Vale do Rossim Reservoir, and the opportunities for refreshing swims after a hike. The magnificent landscapes and the sense of being in a pristine natural environment are consistently highlighted.
Are there any lakes with historical significance or interesting facts?
Yes, many lakes in Serra da Estrela have historical significance, particularly related to hydroelectric power generation. Long Lake, for instance, is the largest water reservoir in the region, with construction dating back to 1911 for hydroelectric purposes. The unique spillway at Covão dos Conchos was also built in 1955 as part of this hydroelectric system to divert water to Long Lake.
Is it possible to access the lakes by car, or are they only reachable by foot?
Accessibility varies by lake. Long Lake is easily accessible by car with nearby parking, making it a convenient starting point for explorations. Vale do Rossim Reservoir also has good access. However, some notable features like Covão dos Conchos are only accessible on foot via a 5 km trail from Long Lake, offering a more immersive hiking experience.
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Still not found your perfect lake in the Serra da Estrela Mountains? Check out the guides of these regions to see even more beautiful places.
