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Les Bois

Top 20 Natural Monuments around Les Bois

Best natural monuments around Les Bois are concentrated in the Jura canton of Switzerland, particularly within the Franches-Montagnes region. This area is characterized by picturesque landscapes, including open pastures, pine forests, and significant natural features. The region's altitude of 1,000 meters contributes to its distinct environment. These natural monuments offer diverse geological formations and unique ecosystems for exploration.

Best natural monuments around Les Bois

  • The most popular natural monuments is Étang de la Gruère, a lake that is part…

Last updated: September 30, 2026

Étang de la Gruère

Highlight • Lake

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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Le Theusseret

Highlight • Waterfall

The Theusseret is a lovely rustic restaurant offering local and seasonal speciality dishes. Located right on the water's edge of the Doubs river, it's a really beautiful spot to grab a drink or stop for some lunch.

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Combe Grède Gorge

Highlight • Gorge

Superb path through the wild gorge to reach the summit of Chasseral. There are some technical passages, with three ladders to climb. The path can be very slippery in rainy weather.

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The Ladders of Death

Highlight • Gorge

The Ladders of Death are a route formed by three metal ladders. They also designate a Via ferrata course which is on the same site and which offers a circuit …

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Étang des Royes

Highlight • Lake

If you're looking for a scenic, moderate trail in the Jura region of Switzerland, you should check out Etang des Royes. There you can admire the view of the water and wildlife.

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Popular around Les Bois

From the Vosges to the Jura mountains – Hexatrek, le Grand Est

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From the Vosges to the Jura mountains – Hexatrek, le Grand Est

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Luc Gesell

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Alessandro
August 24, 2025, Étang des Royes

A detour to this natural pearl is worthwhile

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Please note: following a landslide, Combe Grède is closed until further notice.

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Please note that most of the photos associated with the route are photos of the via ferrata and the names of the ladders themselves, which are very solid stairs and not rope bridges! It is perfectly feasible for hiking, even if the height can be disconcerting.

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Beautiful paths lead to the lake, which is covered by a thick layer of ice in winter - it could be accessed.

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Everything is in good working order. A beautiful experience, thank you to whomever keeps this maintained and safe!

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The Etang des Royes is a haven of peace, far from the crowds that can be encountered around the Etang de la Gruère. Take the time to take a break by the water and enjoy this magnificent setting in the heart of the Franches-Montagnes.

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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.

Translated by Google•

2

1

Superb path through the wild gorge to reach the summit of Chasseral. There are some technical passages, with three ladders to climb. The path can be very slippery in rainy weather.

Translated by Google•

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Frequently Asked Questions

What natural features can I explore around Les Bois?

The region around Les Bois, particularly within the Franches-Montagnes, offers diverse natural features. You can discover tranquil lakes like Étang de la Gruère, dramatic gorges such as Combe Grède Gorge, The Ladders of Death, and Combe de Biaufond, and summits like Mont Soleil. The area is also characterized by vast peat bogs, open pastures, and pine forests, especially in the Vallée du Doubs and Franches-Montagnes regions.

Are there family-friendly natural monuments near Les Bois?

Yes, several natural monuments are suitable for families. The Étang de la Gruère nature reserve is ideal, offering a peaceful 2.8 km circular path around the lake and peat bog, perfect for nature observation. Mont Soleil also provides magnificent views and is accessible via a funicular, making it a pleasant outing for all ages.

What kind of hiking trails can I find among the natural monuments?

You'll find a range of hiking experiences. For a gentle walk, the circular path around Étang de la Gruère is very accessible. More challenging trails include the Combe Grède Gorge, which features technical passages and ladders on its way to Chasseral, and The Ladders of Death, a route with metal ladders in the Doubs gorges. The Combe de Biaufond also offers a wild gorge path with ladders, though it's not recommended for young children or dogs due to its challenging nature.

What is the best time of year to visit the natural monuments around Les Bois?

The natural monuments around Les Bois offer unique experiences throughout the year. Spring and summer are excellent for hiking, cycling, and enjoying the lush landscapes and diverse flora. The Étang de la Gruère is particularly beautiful in all seasons, offering stunning Nordic-style landscapes. In winter, the Franches-Montagnes region is popular for cross-country skiing and snowshoeing, and ice skating is permitted on the Étang de la Gruère at your own risk.

Are there any natural monuments with historical significance in the area?

Yes, the Étang de la Gruère nature reserve holds significant historical value. Its vast peat bog, accumulated over 12,000 years, serves as a historical record of the region's climate, traceable through pollens trapped within its layers. The lake itself was partly formed by an artificial dam built in the 17th century for a mill.

What outdoor activities can I do near these natural monuments?

Beyond exploring the monuments themselves, the region offers a wide range of outdoor activities. You can find numerous hiking trails, including routes like 'Along the Doubs Trail - Stage 2' or the 'Lac de Biaufond — loop from Biaufond'. For cyclists, there are MTB trails such as the 'Mont Soleil Wind Farm – Mont-Soleil Solar Power Plant loop'. The Vallée du Doubs is also excellent for kayaking, and the Franches-Montagnes region is renowned for horse riding. You can also find running trails like 'La Rasse et la Ronde — loop — running from Biaufond'.

Can I observe unique wildlife or plants at these natural sites?

Absolutely. The Étang de la Gruère nature reserve is home to unique flora and fauna adapted to its acidic, boggy soil, including species rare in Switzerland and typical of Siberian tundra. The Vallée du Doubs also boasts rich and diverse wildlife, with sightings of chamois, peregrine falcons, and eagle owls possible in its wild gorges and forests.

Are there any viewpoints offering panoramic scenery?

Yes, the region is rich in stunning viewpoints. Mont Soleil, at 1,280 m, offers magnificent views of the Chasseral and the Combe Grède. The Vallée du Doubs provides numerous scenic spots to admire the river's canyon-like gorge, including the spectacular Saut du Doubs waterfall. The Franches-Montagnes plateau itself offers picturesque panoramas of open pastures dotted with pine forests.

What makes the Vallée du Doubs a significant natural monument?

The Vallée du Doubs is part of a regional nature park of national importance, spanning over 40 kilometers and forming a natural border with France. The Doubs River carves a magnificent canyon-like gorge with cliffs and steep forests. It's known for its rich wildlife, the spectacular 30-meter-high Saut du Doubs waterfall, and its unique cultural landscape shaped by centuries of cattle farming and horse breeding.

What is the Franches-Montagnes region known for?

The Franches-Montagnes region, listed in the Federal Inventory of Landscapes and Natural Monuments, is renowned for its unspoilt landscapes of open pastures dotted with pine forests at an altitude of 1,000 meters. It is particularly famous as the birthplace of the Franches-Montagnes horse, the only native Swiss horse breed. It's a paradise for outdoor enthusiasts, offering ideal conditions for hiking, cycling, and horse riding.

Are there any challenging trails for experienced hikers?

For experienced hikers seeking a challenge, the Combe Grède Gorge offers a path with technical passages and ladders, leading to the summit of Chasseral. Similarly, The Ladders of Death in the Doubs gorges provides a thrilling route with metal ladders. The Combe de Biaufond also features a wild, boxed combe with ladders and wooden platforms along the river, requiring careful footing, especially in damp conditions.

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Extend your search for the best caves by checking out these guides of the top ones around Les Bois:

MontfauconLa Chaux-des-BreuleuxSaint-BraisLes Genevez (JU)MuriauxLes BreuleuxLe NoirmontSaignelégierLes EnfersLe Bémont (JU)SoubeyLajoux (JU)

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