Natural monuments around Courtételle, a municipality in the district of Delémont in the canton of Jura, Switzerland, offer diverse natural experiences. The region is characterized by its communal forests and significant natural sites. These areas provide opportunities for outdoor activities and contribute to the local biodiversity. The landscape features a mix of elevated viewpoints, serene lakes, and ancient geological formations.
Last updated: June 26, 2026
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magnificent tuff stones
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Idyllically situated at the end of the Lützeltal.
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While the prosperous times in the town of Lucelle are over, the Lac de Lucelle is a nature reserve that captivates with its peace, idyll and beauty. The lake can be easily walked around on a well-developed nature trail, and there are many benches where you can watch the ducks and fish in the lake.
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The Source du Doubs is a powerful karst spring in a heavily karstified area of the Jura Mountains. It is located near Mouthe, in the Haut-Jura Regional Nature Park, at an altitude of 937 m at the foot of the wooded, up to 1419 m high Mont Risoux mountain range, which marks the border between France and Switzerland. The Doubs rises from a cave in the rock from a small, approximately five-meter-deep spring basin. The spring discharges an average of 1740 litres per second and is the exit of a complex cave system with several siphons. The discharge can vary greatly. Several layers of rock can be distinguished on the rock above the spring. Below the spring, the river plunges down over a small waterfall. About two kilometers below the Source du Doubs, the approximately nine-kilometer-long Cébriot flows into the Doubs.
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Imposing grotto and at the same time a place of pilgrimage. Here you should switch from the hiking trail near the bridge to the road and pause for a moment and enjoy the gentle coolness and refresh yourself with the water from the Karlsquelle (which is said to have healing powers). A small karst spring arises inside the cave. The water flows as a trickle from a stalagmite into a shallow basin. There is a crucifix under the entrance arch of the grotto, dedicated to Saint Columba of Sens, a 3rd century martyr. The place has been the destination of a pilgrimage on August 15th since the 13th century. The spring water is said to have miraculous healing powers. More: https://de.wikipedia.org/wiki/Grotte_de_Sainte-Colombe
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Lake Lucelle is the smallest in Switzerland and is located in a protected natural area near the French border. The trail around the lake is a comfortable and mostly flat 2km loop, with only 30m of elevation gain and loss. You can enjoy the view of the sparkling water, colorful vegetation and secluded houses on the other side of the lake. Whether you want to run fast or slow, Lake Lucelle offers a delightful experience for trail runners of all levels.
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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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Grotto in the rock with many thank you plaques.
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Beyond the well-known spots, you can discover the ancient Chêne des Bosses, a gigantic pedunculate oak near Châtillon, renowned for its age and gnarled trunk. It's considered one of Europe's largest and oldest oaks. Another unique site is the Grotto of Sainte-Colombe, an impressive grotto and pilgrimage site with a karst spring whose water is said to have healing powers.
Yes, several natural monuments are suitable for families. The Green Lake offers beautiful scenery and refreshing water, surrounded by forests. Lucelle Lake, with its wild and romantic character, has a comfortable and mostly flat 2km loop trail perfect for a leisurely family walk. The Doubs river also features small beaches under trees, ideal for relaxation.
The Courtételle region offers a diverse range of natural features. You'll find elevated viewpoints like the Mont Raimeux Observation Tower and Viewpoint, serene lakes such as Green Lake and Lucelle Lake, and significant rivers like the Doubs. The area is also rich in communal forests and features ancient geological formations, including caves like the Grotto of Sainte-Colombe.
The region around Courtételle is excellent for outdoor activities. You can enjoy various cycling routes, from moderate to difficult, exploring scenic valleys and passes. For hiking enthusiasts, there are numerous trails, including loops around Châtillon and Courtételle, offering diverse experiences from easy walks to more challenging treks. You can find detailed routes in the Hiking around Courtételle and Cycling around Courtételle guides.
Yes, there are several hiking trails that lead to or past natural monuments. For instance, an educational trail of approximately 4 kilometers leads from the village center of Châtillon directly to the ancient Chêne des Bosses. You can also find various loop trails, such as the 'Sentier de la Cendre' from Châtillon or the 'Grotto of Our Lady loop from Courtételle', which are detailed in the Hiking around Courtételle guide.
The natural monuments around Courtételle can be enjoyed throughout much of the year. Spring and autumn offer pleasant temperatures for hiking and cycling, with vibrant foliage or blooming nature. Summer is ideal for enjoying the refreshing waters of the lakes and rivers, and the cool air inside the Grotto of Sainte-Colombe. Even winter can offer unique experiences, though some trails might require appropriate gear.
Absolutely. The Chêne des Bosses near Châtillon is not only a natural wonder but also a protected historical monument, with legends suggesting it could be over a thousand years old and a history tied to local agricultural practices. The Grotto of Sainte-Colombe is a significant pilgrimage site since the 13th century, dedicated to Saint Columba of Sens, adding a deep cultural layer to its natural beauty.
While specific public transport details for each monument vary, many natural sites are accessible from nearby villages. For example, the Chêne des Bosses is reached via an educational trail starting from the village center of Châtillon, which can be accessed by public transport. For other sites, a combination of public transport to a starting point and then walking or cycling is often feasible. It's advisable to check local transport schedules for specific routes.
Generally, dogs are welcome on trails and in natural areas around Courtételle, provided they are kept on a leash and owners clean up after them. Places like Lucelle Lake and the communal forests are popular for walks with dogs. However, always be mindful of local regulations, especially in protected areas or near wildlife.
For breathtaking panoramic views, head to the Mont Raimeux Observation Tower and Viewpoint. From here, you can enjoy a wonderful vista stretching from Val Terbi all the way to the Vosges mountains and the Black Forest. It also features a pleasant picnic area with a lookout tower.
The communal forests of Courtételle are a significant natural asset, covering approximately 308 hectares. They are highly productive and possess high natural value, playing a crucial role in protecting local water sources. Beyond their ecological importance, these forests serve an important social function, offering valuable areas for promenade and relaxation for both residents and visitors, contributing to the region's biodiversity and well-being.
Visitors frequently praise the diverse landscapes, from elevated vistas to serene waters and ancient geological formations. The Mont Raimeux Observation Tower and Viewpoint is loved for its fantastic views and nice picnic area. The Lucelle Lake is cherished for its wild, romantic character and the opportunity to unwind in nature. The Grotto of Sainte-Colombe is appreciated for its impressive, cool atmosphere and spiritual significance. The region's natural monuments have garnered over 140 upvotes and more than 150 photos shared by the komoot community.


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