Natural monuments around Menétrux-En-Joux are primarily found within the Jura department of France. The region is characterized by its natural landscapes, including a series of waterfalls and several lakes. These features are often integrated into hiking routes and offer various viewpoints. The area provides opportunities to observe geological formations and diverse ecosystems.
Last updated: October 21, 2026
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A waterfall with a larger pool and a smaller cascade in a beautiful setting. In front of it is a small stone lynx statue.
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View of the Cascade de L'Eventail. A small, rocky path leads directly to the waterfall.
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Beautiful view of the central waterfall Cascade Du Hérisson with several cascades.
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The Lac d’Ilay, also called Lac de la Motte, is a lake in the French Jura, in the Jura department, about 14 km south of Champagnole in Franche-Comté. It lies at 774 m on the territory of the municipalities of Le Frasnois and La Chaux-du-Dombief and covers an area of around 0.7 km². The lake is 1.9 km long, a maximum of 400 m wide and has a small island (Île de la Motte). Its greatest depth is 32 m.
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Lacs de Maclu are two adjacent lakes in the western part of the French Jura, in the Jura department of Franche-Comté. They are located at an elevation of 779 m in a depression in the High Jura, in the region of the Five Lakes near Le Frasnois, about 12 km south of Champagnole. The Petit Maclu, located to the northeast, has an area of 5 hectares, a length of about 500 m, and a maximum width of about 120 m. Its greatest depth is 11 m. It lies entirely within the municipal territory of Le Frasnois.
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Easy, shaded path, perfect for cooling off in hot weather.
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The region is renowned for its natural beauty, with the Hérisson Waterfalls being a major highlight, featuring a series of cascades along a 7 km path. Other popular spots include the Fan Waterfall, known for its height and stepped layout, and the Saut Girard Waterfall, which offers a beautiful setting with a larger pool.
The most prominent waterfalls are the Hérisson Waterfalls, a dramatic series of 31 cascades, including seven major ones. Among these, the Grand Saut plunges 60 meters, and the Cascade de l'Éventail drops 65 meters, both offering spectacular views.
Yes, the area boasts several beautiful lakes. Petit Maclu Lake and Lake Ilay are part of a string of lakes in a Natura 2000 area, offering rich wetlands. Lac de Bonlieu and Lacs du Val et de Chambly are also nestled within the picturesque Hérisson valley, providing tranquil spots for relaxation. Further afield, Lac de Chalain is the largest natural lake in the Jura, known for its stunning turquoise waters.
For breathtaking views, consider the Belvédère de la Baume, which offers a magnificent perspective over the Lemme valley and the Plateau de Nozeroy. The Belvédère de l'Éventail provides a secure platform for observing the impressive Cascade de l'Éventail. For more expansive vistas, Pic de l'Aigle and the Belvédère des Quatre Lacs offer stunning panoramas over the 'plateau des sept lacs' and the Haut Jura Regional Nature Park.
Many natural sites in the area are family-friendly. The trails around the Hérisson Waterfalls are well-maintained, and the Maison des Cascades provides educational insights. Lakes like Petit Maclu Lake and Lake Ilay are also noted as family-friendly, with easy, shaded paths perfect for walks.
Yes, the Saut Girard cascade, part of the Hérisson series, is historically significant and features an accessible platform for people with reduced mobility, allowing everyone to enjoy its beauty.
The area offers a variety of outdoor activities. You can find numerous mountain hikes, such as the 'Fan Waterfall – Le Grand Saut loop from La Chaux-du-Dombief'. There are also running trails, including a 'Lake Ilay – Grand Maclu Lake loop'. For cyclists, cycling routes like the 'Grand Maclu Lake – Lac de la Motte loop' provide scenic rides.
The Hérisson Waterfalls are particularly spectacular after periods of rain, when the water flow is at its most impressive. In summer, some cascades might be less active. Visiting in spring or autumn often provides a good balance of water volume and pleasant weather for exploring the trails.
Visitors frequently praise the refreshing escape offered by the picturesque paths along the Hérisson river, revealing breathtaking panoramas. The diverse ecosystem around the lakes and the stunning photo opportunities, especially at Lac de Bonlieu and Lac de Chalain, are also highly appreciated. The region's natural beauty and the chance to explore well-maintained trails are consistently highlighted.
Yes, the Maison des Cascades provides valuable insights into the geological formation of the Hérisson valley, explaining how the river carved through the typical Jura reculée. You can also learn about the local wildlife and the history of the area, including mentions of cascades like Saut Girard dating back to 1170.
Many of the trails around the natural monuments are designed as loops or can be combined for circular walks. For instance, the Hérisson Waterfalls can be explored via a 7 km path, often done as a loop. The lakes, such as Lake Ilay, also offer easy circular walks around their shores.
The wetlands around lakes like Petit Maclu Lake are particularly rich in biodiversity, offering an exceptional habitat for many animal species. You can observe various water lilies, reeds, rushes, and sedges, which support a diverse range of wildlife. The Maison des Cascades also provides information on the local fauna.


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