Lakes around Lajoux (JU) are situated within the Haut-Jura Regional Natural Park, providing access to various lakes in both the French and Swiss Jura regions. This area is characterized by its mountainous terrain and preserved natural environments. The lakes offer diverse landscapes, ranging from high-altitude mountain lakes to peat bogs and artificial reservoirs.
Last updated: May 11, 2026
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magnificent tuff stones
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Bring time! The black water of the lake has a mystical effect.
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The Etang de la Gruère nature reserve is a paradise for nature lovers. Opt for a morning hike to enjoy the calm, and to observe the rising mists over the water.
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The Plain-de-Saigne pond is a small artificial lake located in Montfaucon. It's a great place to picnic and admire the reflections of the sky and trees on the water. You can also learn about the history of the lake, which was once home to a mill and peat extraction site.
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The Sorne has dug itself deep into the rocks and today roars between almost vertical walls through the wildly romantic gorge. Numerous springs flow into the Gorges du Pichoux. Are there actually 1,000 sources, as the name “Pichoux” translates to? At the end of the gorge, Lac Vert shines like an emerald in the most wonderful shades of green - a fantastic place for your picnic. The Gorges du Pichoux is located on the road between Bellelay and Undervelier. By public transport or by car go to Sornetan, Le Pichoux.
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A lovely rest area by a pond (Etang). It's truly one of the highlights of the tour.
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Beautiful pond! Very nice for hiking!
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The Étang de Plain de Saigne is located in the municipality of Montfaucon in the canton of Jura. It lies embedded in lush alpine meadows in a high moor area at an altitude of 860 meters above sea level. The pond is under nature protection.
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The region offers several popular lakes. Among them, Étang de la Gruère is a nature reserve known for its exceptional flora. Étang Plain-de-Saigne is a significant birdwatching spot, and Green Lake (Lac Vert) is appreciated for its emerald color. Further afield, Lac de Joux in Switzerland is the largest body of water in the Jura mountain range, and Lac de Lamoura in France is the highest lake in the French Jura.
Yes, several lakes are ideal for families. Étang de la Gruère is particularly family-friendly, offering picnic areas and designated swimming spots. Étang Plain-de-Saigne and Green Lake are also noted as family-friendly. Lac de Lamoura in France is also well-suited for families with its picnic areas and swimming opportunities.
The lakes around Lajoux (JU) are known for diverse natural features. Étang de la Gruère and Étang Plain-de-Saigne are significant for their peat bogs and unique aquatic flora. Lac de Lamoura also features exceptional flora, including peat bogs and aquatic moss. Green Lake is notable for its emerald color, a reflection of the surrounding trees.
Yes, swimming is possible in several lakes. Étang de la Gruère has designated swimming spots. Lac de Divonne is known for its calm waters and a beach suitable for swimming. Lac de Joux offers water temperatures ideal for swimming in summer (up to 24 degrees Celsius), and Lac Brenet has small shaded beaches popular with swimmers. Note that swimming is not allowed in the bog at Étang Plain-de-Saigne.
Absolutely. The region offers numerous hiking trails. For example, the La Gruère Lake and High Moor Circular Trail is a wonderful nature reserve to explore. You can find more hiking options, including routes like the 'Combe Tabeillon – Étang Plain-de-Saigne loop' and 'Pré des Combes – Étang de Bollement loop', in the Hiking around Lajoux (JU) guide.
Lac de Joux and Lac Brenet in the Swiss Jura are excellent for winter activities. Both lakes are known to freeze completely, forming Switzerland's largest natural ice rink at Lac de Joux. This offers unique opportunities for skating and walking on the ice. Lac Ter also provides a smaller, family-friendly surface for skating when frozen.
Green Lake is highly praised for its picturesque scenery and emerald color. Lac des Rousses is appreciated for its scenic mountain setting. Étang de la Gruère is considered a beautiful and protected natural monument, especially captivating in the morning with rising mists.
While popular spots can get busy, smaller lakes like Lac Brenet, located northeast of Lac de Joux, offer a more leisurely experience with small shaded beaches and a path around the lake that can be completed in about an hour. Étang Plain-de-Saigne is also described as a very peaceful place to rest and observe nature.
Beyond hiking, the region offers various outdoor activities. Lac de Joux is popular for windsurfing, sailing, and biking in summer. You can find numerous road cycling and mountain biking routes in the area. Explore options like 'Schelten Pass and Sorne Gorge Loop' for road cycling or 'Étang de Bollement – Trail along the railway line loop' for mountain biking in the Road Cycling Routes around Lajoux (JU) and MTB Trails around Lajoux (JU) guides.
Visitors frequently highlight the preserved natural environment and tranquility. Many appreciate the unique flora, such as peat bogs and aquatic moss, and the opportunity for birdwatching at spots like Étang Plain-de-Saigne. The picturesque scenery, especially the emerald color of Green Lake, and the mystical effect of the dark water at Étang de la Gruère, are also often mentioned.
Yes, Étang Plain-de-Saigne is a raised bog and peat bog of national importance, and it is specifically highlighted as a significant birdwatching spot. It's a peaceful place to observe nature and its avian inhabitants.
For a leisurely walk, the path around Lac Brenet can be completed in about an hour. For a longer experience, the La Gruère Lake and High Moor Circular Trail offers a wonderful nature reserve to explore, which will take more time depending on your pace.
The largest body of water in the Jura mountain range is Lac de Joux, located in the Swiss Jura (Canton of Vaud). It is situated at an altitude of 1,004 meters and is fed by the Orbe and Lionne rivers.
Yes, Green Lake (Lac Vert) in Haute-Sorne is a small artificial lake formed by the Sorne river, known for its beautiful emerald color. Étang de Bollement was also originally built for hydroelectric power and is now a nature reserve.
The best time to visit depends on your preferred activities. Summer is ideal for swimming, windsurfing, and hiking, with cool mountain air and pleasant water temperatures. Winter offers a unique experience, especially at Lac de Joux and Lac Brenet, when they freeze completely for ice skating and walking. Spring and autumn provide beautiful scenery for hiking, with changing foliage and fewer crowds.


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