Best lakes in Mercantour National Park are primarily of glacial origin, situated at high altitudes amidst stunning mountain scenery. This region offers diverse natural landscapes, from clear, icy waters to serene settings. The park is characterized by an Alpine environment of rocky outcrops and jagged peaks, providing numerous opportunities for exploration. With over 600 km of well-maintained trails, Mercantour is a prime destination for those seeking natural wonders.
Last updated: July 1, 2026
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Very beautiful lake in a superb landscape. Few people in September so very pleasant. Just watch out for the sheepdogs, not aggressive but impressive.
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On the descent near the tunnel, I found a landslide, by bike it was passable, but by car no.
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https://youtu.be/rm1T5izm57A?si=Wjv8z7eOzrlJQNXL A wonderful, shimmering green lake, which the locals also like to swim in. There are certainly a lot of cars parked along the road on weekends. The scenery is fantastic.
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Very beautifully situated reservoir, but the water is not inviting for swimming. The dam is definitely worth seeing.
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Valdeblore La Colmiane is a resort that offers families many activities: summer tobogganing, tree climbing, mini-golf, swimming pool, equestrian center, paragliding, trampoline, farm visit, hiking with pack donkeys, climbing, and Via Ferrata as well as 30 kilometers of ski slopes in winter. In winter as in summer, the resort offers a giant zip line (the longest in France) which flies safely over the resort and its lakes, at 130 km/h (maximum).
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The Mille Fonds lakes are a succession of high-altitude lakes near the Col u Barn. Their deep blue enhances the panorama that some of them reveal, like Lake Long.
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Classified as a Natura 2000 area, the Lignin lakes are of glacial origin. Located on the high plateaus at more than 2,200 meters of latitude, they are not permanent and the smaller of the two lakes dries up during the summer, giving way to more or less humid areas.
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Beyond the well-known spots, Lac Long, part of the Millefonts lakes, is highly appreciated for its deep blue waters and panoramic views. Visitors also enjoy the lakes near La Colmiane, which offer a variety of activities.
Yes, several lakes are ideal for families. La Colmiane resort, for instance, offers many activities alongside its lakes. Lac d'Allos is considered one of the easiest and most beautiful hikes, accessible via an interpretation trail, making it perfect for a family picnic. Lac du Lauzanier is also very popular with families due to its easy access and frequent marmot sightings.
Hiking difficulties vary. Lac d'Allos is known for an easy and beautiful hike. Lac du Lauzanier is also easily accessible. For those seeking more challenge, Lac Nègre is recommended for advanced hikers, though its well-marked path is shaded. The hike to Lacs de Millefonts is of medium difficulty, offering modular options for length and challenge. Many trails are well-maintained and signposted, with options ranging from moderate to difficult, as seen in routes like the Mountain Hikes in Mercantour guide.
Mid-summer is popular for visiting lakes like Lac de Trécolpas. June is particularly beautiful for Lac Nègre due to rhododendrons in the upper valley. Generally, the summer months offer the best conditions for hiking and enjoying the high-altitude lakes, though some smaller lakes, like one of the Lacs de Lignin, may dry up in summer.
The lakes are primarily of glacial origin, set amidst stunning mountain scenery with rocky outcrops and jagged peaks. You'll find crystal-clear waters, diverse Alpine landscapes, and unique geological structures like the limestone bridge near Lacs de Vens. Lac d'Allos, for example, is the largest natural high-altitude lake in Europe, feeding the source of the Verdon River.
Yes, parking is generally available, though access can be regulated in popular areas. For Lac d'Allos, parking and access have been regulated since summer 2021 due to its popularity. Lac de Trécolpas can be reached from the upper car park of Boréon. A shuttle service operates on weekends from Saint-Martin-Vésubie to the trailhead for Lac Nègre.
Absolutely. The Mercantour National Park is rich in fauna. Marmots are frequently seen roaming around Lac du Lauzanier in the summer. The region around Lacs de Vens boasts varied wildlife, including mountain sheep, chamois, and eagles. The lakes are also home to fish like trout and char, particularly in Lac d'Allos.
Wild swimming is permitted in some lakes, such as Lac de Trécolpas, for those who don't mind the icy waters. However, due to the high altitude and glacial origin, many lakes have very cold temperatures.
Beyond hiking, the Mercantour region offers a wide range of outdoor activities. You can find challenging mountain hikes, various running trails, and even waterfall hikes. Resorts like La Colmiane offer summer tobogganing, tree climbing, mini-golf, paragliding, and a giant zip line. Many trails are suitable for exploring the natural wonders of the park.
The Mercantour is dotted with many beautiful lakes. Lac Nègre is known for its impressive sights and mineral atmosphere. Lacs de Vens are considered among the prettiest, featuring an old glacial cirque, waterfalls, and unique geological structures. Lac du Long Superior, located in the heart of the rock engravings of the Vallée des Merveilles, offers a unique historical and natural combination.
Yes, some areas offer amenities. The Vens refuge, a mountain hut, is located on the banks of the upper Long lake in the Lacs de Vens area. The village of Saint-Martin-Vésubie serves as a good base for exploring lakes like Lacs de Prals and Lacs de Millefonts. La Colmiane is a resort with various facilities including a swimming pool, equestrian center, and dining options.
Lac d'Allos is considered one of the easiest and most beautiful hikes in Mercantour National Park. While specific times vary based on starting point and individual pace, it's generally accessible for a day trip, often via an interpretation trail. For a more detailed route, you can explore options like the Waterfall hikes in Mercantour guide which includes routes to Lac d'Allos.


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