Best lakes in Cornalvo are primarily centered around the Cornalvo Reservoir, a significant body of water within the Cornalvo Natural Park. This area features a landscape of low ridges, holm oaks, cork-oaks, and Mediterranean woodland. The reservoir itself is a notable example of Roman engineering, with its dam dating back to the 1st or 2nd century AD, originally built to supply water to ancient Mérida. The natural park is recognized for its ecological value, providing habitat for more than 200…
Last updated: June 29, 2026
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The Cornalvo Dam is an impressive Roman engineering work located about 15 km from Mérida. Built in the 1st century AD, this dam is still in use today and is part of the Cornalvo Natural Park. The reservoir is an ideal place to enjoy nature and explore Roman history.
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Built around 130 AD, this dam was used to supply water to the ancient Roman city of Augusta Emerita. The reservoir and its surroundings were declared a natural park in 2004, making it an ideal destination for nature and history lovers.
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A place with very nice views of Sierra Bermeja. It has a circular path of about 5/6km that is very cyclable, with an initial part (depending on which direction you go) that is a bit steep.
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In spring the number of birds that can be observed from its viewpoints is spectacular and how beautiful the site can be.
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In spring the number of birds that can be observed from its viewpoints is spectacular, without counting the herds of cattle that come to drink and frolic on the shore of the reservoir.
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Reservoir that is located within the Cornalvo Natural Park and that represents one of the water areas that exist in this protected area. Very beautiful in leafy and wet seasons!
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One of the attractions of the Cornalvo Natural Park is the homonymous reservoir that is very close to the town on the A-5 highway and is easily reached from Trujillo or San Pedro de Mérida. A place that deserves to visit and to which you can turn completely around a picturesque path.
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The primary body of water, the Cornalvo Reservoir, is historically significant due to its Roman dam, the Cornalvo Dam. Built around 130 AD, it was an integral part of the Aqua Augusta system, supplying water to the ancient city of Augusta Emerita (modern-day Mérida). This makes it one of the oldest and best-preserved Roman hydraulic works still in use, and it's part of the UNESCO World Heritage site of Mérida.
Yes, the Cornalvo Reservoir offers excellent hiking opportunities. A popular option is the Pantano de Cornalvo Circular Route, which is about 6.5 km (4.7 miles) long and provides views of the lake, the dam, and the surrounding dehesa landscapes. For more options, you can explore various easy hikes in the area, such as the "Cornalvo Reservoir Loop" found in the Easy hikes in Cornalvo guide.
The Cornalvo Natural Park is a Special Protection Area for birds (SPA) and boasts rich biodiversity with over 200 vertebrate species. You can often spot notable bird species such as the Spanish imperial eagle, black vulture, black stork, Great Crested Grebe, Eurasian Spoonbill, and Red-crested Pochard, especially around the Las Muelas Reservoir. The surrounding dehesa also supports various mammals and amphibians.
Yes, the Cornalvo Natural Park is considered family-friendly. Many of the highlights, including the Cornalvo Dam, Cornalvo Reservoir, and Las Muelas Reservoir, are categorized as such. There are easy walking paths and opportunities for birdwatching that can be enjoyed by all ages. The visitor center can also provide more information on suitable activities.
Spring is often recommended as the best time to visit. During this season, the weather is pleasant for hiking, and the number of birds that can be observed from viewpoints, especially at Las Muelas Reservoir, is spectacular. The landscape is also lush and green after winter rains.
Yes, the winding shape of the Cornalvo Reservoir naturally creates diverse landscapes with reflections and coves, offering many scenic spots. The Las Muelas Reservoir also has dedicated viewpoints where you can observe birds and the natural scenery. The Pantano de Cornalvo Circular Route provides very nice views of Sierra Bermeja.
While the guide data doesn't explicitly state dog-friendly policies, natural parks in Spain generally allow dogs on trails if kept on a leash. It's always best to check local signage or contact the park's visitor center for the most current regulations regarding pets to ensure a responsible visit.
Beyond hiking, the Cornalvo area is excellent for cycling and mountain biking. You can find various routes, such as the "Cornalvo Dam – Cornalvo Reservoir loop" for mountain biking in the MTB Trails in Cornalvo guide, or the "Cornalvo Park and Reservoirs Loop" for touring bicycles in the Cycling in Cornalvo guide. Birdwatching is also a very popular activity.
The Cornalvo Dam and Reservoir are easily reached from nearby towns like Trujillo or San Pedro de Mérida, and there are usually designated parking areas near the main access points and trailheads. The visitor center on the outskirts of Trujillanos can also provide guidance on parking locations.
The Cornalvo Reservoir is a protected natural area and a historical site. While it's a beautiful body of water, swimming is generally not permitted to preserve its ecological value and ensure visitor safety. It's best to enjoy the reservoir from its shores and trails.
The Cornalvo Reservoir is nestled between low ridges, the Sierra del Moro and Sierra Bermeja. The surrounding Cornalvo Natural Park is characterized by holm oaks, cork-oaks, Mediterranean woodland, and dehesa pastures. The gentle hills and ridges form a natural amphitheater, creating a picturesque and tranquil setting.
Yes, there are several easy walking paths. The Easy hikes in Cornalvo guide lists routes like the "Cornalvo Reservoir Loop" (approx. 7.5 km) and shorter loops around Las Muelas Reservoir (approx. 5 km), which are suitable for leisurely strolls and families.
The popular circular route around the Cornalvo Reservoir, also known as the Pantano de Cornalvo Circular Route, is approximately 6.5 km (4.7 miles) long. Depending on your pace and stops for enjoying the views, it typically takes around 1.5 to 2.5 hours to complete.
There is a visitor center located on the outskirts of Trujillanos. This center can provide maps, information about trails, wildlife, and historical aspects of the park, assisting you during your visit.


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