Lakes around Santa Marinha e São Martinho e São Martinho e São Martinho are found in a region of Portugal historically known for its architecture and local heritage. While the parish itself is not characterized by prominent natural lakes, the surrounding area, particularly the Serra da Estrela, features several notable water bodies. This landscape offers diverse natural features for exploration.
Last updated: July 3, 2026
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Hiking around Santa Marinha e São Martinho e São Martinho e São Martinho
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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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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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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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The most popular lakes in the surrounding area, particularly within the Serra da Estrela, include Long Lake, which is the largest water reservoir in the Serra da Estrela, and Vale do Rossim Reservoir, known for its leisure and recreation area. The Covão dos Conchos Trail also leads to a unique water feature that is highly appreciated by visitors.
The lakes are primarily found in the Serra da Estrela, a region characterized by its glacial origins. You can expect to see wide depressions of glacial origin, numerous glacial scars along lake banks, and magnificent landscapes with granite formations and pine trees. The area offers diverse natural features, from large reservoirs to unique water formations like the Covão dos Conchos.
Yes, there are several hiking opportunities. For example, the Covão dos Conchos Trail is a popular route leading to a distinctive water feature. Another option is the Trail to the Upper Lakes, Serra da Estrela Natural Park, which offers beautiful views, though some sections can be overgrown.
Hiking difficulties vary. Trails like the Covão dos Conchos Trail are generally considered easy but require good walking shoes due to scree and uneven paths. Other trails, such as the Trail to the Upper Lakes, can be challenging, with overgrown sections and requiring careful navigation using stone markers.
The region is beautiful year-round, but for hiking and enjoying the outdoors, spring and autumn offer pleasant temperatures. Summer is also popular, especially at higher altitudes where the heat is tempered. However, be aware that some paths might be wet after heavy rains in cooler months, and sun protection is essential during sunny weather as there's often no shade on trails.
Many areas are family-friendly. The Vale do Rossim Reservoir, for instance, has developed into a leisure and recreation area suitable for strolls and enjoying nature. While some trails like Covão dos Conchos Trail are generally easy, they may have scree, so good footwear is recommended for all family members.
Beyond hiking, the area offers various outdoor activities. You can find numerous road cycling routes, such as the 'Covão do Ferro Lagoon – Serra da Estrela loop from Sabugueiro', and touring bicycle routes like the 'Serra da Estrela – Casa das Obras Fountain loop from Seia'. There are also running trails, including a 'Vale do Rossim Reservoir loop'. For more details on these routes, you can explore the Road Cycling Routes, Cycling, and Running Trails guides for the region.
Yes, particularly near popular spots. For example, the Vale do Rossim River Beach Restaurant is located right on the Vale do Rossim Reservoir, offering a place to eat and drink. Near this reservoir, you can also find the Vale do Rossim Eco Resort, which provides camping, yurts, or wooden cabins for longer stays.
While specific parking details for every lake are not provided, popular areas like Vale do Rossim Reservoir, being a recreation area, typically have facilities for visitors, which would include parking. It's advisable to check local signage upon arrival.
The Vale do Rossim Reservoir is known for summer swims and is a popular leisure area. Visitors have also mentioned short swims in the water reservoir of the dam near Covão dos Conchos Trail to relax after a walk, suggesting opportunities for wild swimming in suitable spots.
The Covão dos Conchos Trail leads to a unique and impressive water feature: a funnel-shaped spillway that creates the illusion of a hole in the lake, drawing water into an underground tunnel. It's a natural monument offering magnificent landscapes, especially when the water flows strongly.
Long Lake (Lagoa Comprida) is significant as the largest water reservoir in the Serra da Estrela, located at approximately 1,600 meters altitude. It originated from a glacial depression and is notable for its geomorphological features, including visible glacial scars along its banks. It also plays a role in hydroelectric generation.


Still not found your perfect lake around Santa Marinha e São Martinho e São Martinho e São Martinho? Check out the guides of these regions to see even more beautiful places.