Lakes around Harnes offer diverse natural and recreational areas, despite the absence of large natural lakes directly within the town. The region features several renatured sites, including former mining areas transformed into wetlands and ponds. These locations provide habitats for various flora and fauna, making them significant ecological sites. Visitors can find opportunities for walking, relaxation, and observing nature in these rehabilitated landscapes.
Last updated: June 24, 2026
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The forest and manifique in this spring period the fauna and flora and with the calm of nature we can observe deer 🦌 🥾🌳🦌
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L'île aux Saules is a nature and recreational area located in Billy-Berclau, France. The area is a popular destination for walkers and nature lovers and offers a range of activities including fishing, walking and picnicking. The area is open all year round from 9am to 5pm.
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There you can explore a small, intimate islet from where you will have a breathtaking view of the canal.
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A pleasant place for a short break or a stroll along the water's edge, alone or with family.
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nice well wooded place
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A small national forest but rich in fauna and flora. You can walk there on well-developed paths and enjoy the many small ponds that dot the forest.
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Visitors frequently enjoy several spots. Marsh Pond is popular for its fountain, benches, and fishing opportunities. Another favorite is Phalempin State Forest Ponds, known for its rich fauna and flora and well-developed paths for wildlife observation. The Marais de la Galance offers a pleasant natural area for short breaks and photography.
Yes, several locations are suitable for families. Marsh Pond and Phalempin State Forest Ponds are both marked as family-friendly in the komoot community. Additionally, the Étang des Argales in Rieulay offers a recreational zone with an artificial beach where swimming is supervised during July and August, along with picnicking areas and walking paths.
The areas around Harnes' lakes offer diverse activities. You can enjoy walking, picnicking, and fishing at places like L'île aux Saules. For cycling, there are numerous routes, including those around the Canal de la Deûle. You can find more details on cycling routes in the Cycling around Harnes guide. Mountain biking enthusiasts can explore trails listed in the MTB Trails around Harnes guide, and gravel biking options are available in the Gravel biking around Harnes guide.
Many lakes offer picturesque views. Marsh Pond features a beautiful little pond with a fountain. Phalempin State Forest Ponds provides serene forest views with many small ponds. L'île aux Saules offers breathtaking views of the canal, being uniquely situated at the intersection of the Deûle and Aire canals.
While not directly in Harnes, the Étang des Argales in Rieulay features an artificial beach where swimming is permitted and supervised during July and August, typically from 2 PM to 6 PM. It's a popular spot for cooling off during the summer months.
The lakes and natural areas around Harnes are rich in biodiversity. At Phalempin State Forest Ponds, you can observe a variety of fauna and flora, including deer. The Étang des Argales is home to around a hundred different bird species, making it an important ecological site. The Saint-Ladre Pond Nature Reserve is particularly excellent for birdwatching, especially during migratory seasons, and hosts many rare plant and animal species in its wetlands.
Yes, several locations offer well-maintained paths. Phalempin State Forest Ponds has well-developed paths suitable for walking. The Étang des Argales also features maintained paths for walking and biking. The Saint-Ladre Pond Nature Reserve provides accessible walking trails with explanatory signs, making it suitable for exploring the ecosystem.
Many sites are enjoyable year-round. L'île aux Saules is open year-round from 9 AM to 5 PM. For swimming at Étang des Argales, July and August are ideal due to supervised bathing. Birdwatching at the Saint-Ladre Pond Nature Reserve is particularly rewarding during migratory seasons. Spring and autumn generally offer pleasant weather for walking and observing nature.
While many outdoor areas are generally dog-friendly, it's important to check specific regulations for nature reserves. For example, dogs have been strictly prohibited at the Saint-Ladre Pond Nature Reserve since 2023 to protect wildlife. Always look for signage or specific rules at each location you plan to visit with your pet.
Yes, the Étang des Argales in Rieulay is a remarkable example of ecological rehabilitation, developed on the region's largest flat slag heap. Its transformation from a mining site into a vibrant natural and recreational space highlights a unique blend of industrial history and natural renewal. The Saint-Ladre Pond Nature Reserve also has origins in peat extraction from the 18th and 19th centuries, which created its current pond landscape.
For a peaceful break, Marsh Pond offers benches to linger and is described as super quiet. The Etang de Wingles is also a nice spot for a refreshment break. The Saint-Ladre Pond Nature Reserve emphasizes a peaceful atmosphere for relaxing strolls amidst nature.
Many of the paths around the lakes are suitable for easy walks. Phalempin State Forest Ponds offers well-developed paths. L'île aux Saules is a popular destination for walkers. The Saint-Ladre Pond Nature Reserve also provides well-maintained walking trails, perfect for a peaceful and easy exploration of the wetlands.


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