Best lakes around National Park Serra Estrela are found within Portugal's largest protected area, known for its diverse aquatic features. The park's landscape is characterized by glacial formations and a significant hydroelectric system. These lakes offer varied attractions, from natural beauty to engineering marvels. The region provides opportunities for exploration of its unique geological and man-made features.
Last updated: August 8, 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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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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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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A beautiful nature trail, about 9 km round trip to Covão dos Conchos. Unfortunately, on August 15th, the water couldn't reach the hole and thus reveal the waterfalls. It's a reservoir, part of the Serra da Estrela hydroelectric system. A funnel-shaped drainage structure that allows water to flow from this body of water to Lagoa Comprida. The spillway was built in 1955 to divert water from Ribeira das Naves to Lagoa Comprida. Over the past 60 years, moss and foliage have grown over the mouth of the funnel, creating a captivating spectacle. It is 4.6 meters high and 4.8 meters in circumference. The tunnel that collects the water is 1,519 meters long. It's a stunning place to visit, not only for the combination of human intervention and nature, but also for the surrounding landscape.
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Located at an altitude of approximately 1,600 meters, Lagoa Comprida is the largest water reservoir in the Serra da Estrela, intended for hydroelectric generation. This natural lake lies in a wide depression of glacial origin, approximately one kilometer long, which fed the Covão Grande glacier. Numerous glacial scars are visible along its banks, making this lake one of the most interesting geomorphological sites in the Serra da Estrela. Construction on this lake began in 1911, and by 1914, it was already six meters high. Later, in 1965, it underwent heightening work that increased its height to 28 meters, currently boasting a storage capacity of approximately 14 cubic hectometers, flooding an area of approximately 80 hectares. Small streams of water flow into this lagoon, as well as water retained in the Covões dos Conchos and Covões do Meio and carried to this lagoon through underground tunnels.
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We walked this walk in October, on a beautiful day, after a few days of heavy rain. Due to the previous wet days, parts of the path were quite a challenge. Certainly to keep your feet dry. The advantage was that the water flowed nicely into the 'drain'. Beautiful sight and impressive. Due to the path of pebbles, boulders, unevenness, etc., it is advisable to wear good walking shoes. Take enough food and drink with you, as is always the advice. In sunny weather, protection from the sun is absolutely necessary. There is no protection from the sun during the walk. Walk calmly, enjoy the surroundings and let everything sink in.
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The lakes in National Park Serra Estrela are unique due to their diverse origins; many are of glacial formation, while others are integral parts of a hydroelectric system. This combination creates a landscape featuring both natural beauty and impressive engineering, such as the distinctive bell-mouth spillway at Covão dos Conchos Trail.
Yes, several lakes offer family-friendly experiences. Vale do Rossim Reservoir is a popular spot for recreation, including summer swims and pedaloes. The nearby Vale do Rossim River Beach Restaurant also caters to families, offering amenities and dining options right by the lake.
The area around the lakes offers a variety of outdoor activities. You can explore numerous hiking trails, including those leading to waterfalls. For cycling enthusiasts, there are dedicated routes for both touring bicycles and mountain bikes. For more details on routes, you can check the guides for Cycling around National Park Serra Estrela, MTB Trails around National Park Serra Estrela, and Waterfall hikes around National Park Serra Estrela.
Vale do Rossim Reservoir is an excellent choice for swimming and water sports. Located at over 1,400 meters above sea level, its crystal-clear waters are inviting for summer swims, and visitors can also enjoy activities like kayaking and pedaloes.
Yes, the 'Route of the Lakes' is a well-known trail that starts from Long Lake (Lagoa Comprida). This route allows you to explore several other lakes in the area, including Lagoa Redonda, Laguna Seca, Corvao do Forno, and Corvao do Curral, offering a comprehensive experience of the park's aquatic features.
The summer months are ideal for recreational activities like swimming and pedaloes at lakes such as Vale do Rossim Reservoir. However, for hiking and enjoying the full flow of waterfalls like the Hidden cascade at Poço do Inferno, spring and early summer, or after periods of rain, are often recommended for more vibrant scenery and water levels.
Yes, near Vale do Rossim Reservoir, you'll find the Vale do Rossim River Beach Restaurant, which offers dining options. There's also an Eco Resort nearby for those looking to extend their stay with camping, yurts, or wooden cabins.
Covão dos Conchos Trail is famous for its unique bell-mouth spillway, an artificial drainage structure built in 1955. It transfers water from Ribeira das Naves to Long Lake as part of the hydroelectric system, creating the illusion of a 'hole in the lake' and making it a popular hiking destination.
Beyond the more popular spots, you can discover serene locations like Peixão Lagoon, described as a 'river jewel in the glacial granite landscape,' showcasing the region's natural beauty. Covão do Boeiro also offers a natural amphitheater with a lagoon, providing stunning scenery and profound mountain silence, though it may dry up in hot summers.
The lakes are set within a landscape shaped by glacial activity. You can observe numerous glacial scars along the banks of Long Lake, making it a significant geomorphological site. The entire park features impressive granite formations and valleys carved by ancient glaciers.
Visitors frequently highlight the magnificent landscapes, the unique natural and man-made features like the Covão dos Conchos spillway, and the tranquility of the mountain environment. Many appreciate the opportunities for hiking, the refreshing swims in the clear waters, and the chance to connect with nature away from the crowds.


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