Sornetan walks

Starting from Les Blanches-Fontaines south of Undervelier (Canton of Jura), this hike offers a magnificent ascent of the Sorne river and its gorges dotted with several waterfalls, passing by Lac Vert, all in a wild environment, to the hamlet of Pichoux, then climbing up to the plateau overlooking the gorges to enjoy a magnificent view. Continue along the plateau via Rebévelier, then a moderately pleasant descent down the Côte de Tirmenté to the Combe des Beusses. Return to the lush vegetation at the bottom of the valley via the Combe es Monin (home to a private foundation dedicated to children), then a short climb to Blanche Maison with another beautiful view of the landscape and a hilly descent passing above the Pré de Joux, then through several pastures towards Undervelier. Short link along the road, climbing up the Sorne to the start.

A beautiful area for spending the night in a van or camping serves as a car park. The hike starts through a free zoo, then you can cool off in the gorges before returning via the heights of the city. A great route when it's hot, which you can listen to to avoid the heat of the city on the last kilometre...

The landscapes you pass through here are among the most beautiful in the Sundgau region. The rock shelter of Mannlefelsen, a major Mesolithic site in Alsace, precedes the Ebourbettes, which tell the story of General Giraud's escape in 1942. Further on, the ruins of Morimont offer an interesting history lesson on how a medieval castle was adapted to firearms.

The route forms a loop via the Métairie des Plânes, climbing the Combe Grède before reaching the Chasseral ridge to the east of the summit via the Métairie du Milieu.All the difficulties are behind you when you reach the summit, where you can enjoy a picnic. Return to the car park by descending via Les Limes and La Vieille Vacherie. (i)User comment on 21 June 2025 On Thursday 19 June, when we set off from Villeret, the Combe Grède pass was closed due to rockfalls and fallen trees and therefore inaccessible. For more information, contact the tourist office in St-Imier or Villeret. >This passage to Chasseral can be bypassed from the start by taking the left-hand path towards Les Limes, Derrière, then Pré au Auges, where you come out at the Combe Grède exit. To return from the Hotel du Chasseral, the trail leads to the Métairie de St-Jean, then back to Pré aux Auges, where you head towards St-Imier and then Villeret.

The Raemel mountain range, two kilometres long, blocks the horizon and rises to an altitude of 832 metres. It is the highest point in the Alsatian Jura, accessible via a picturesque limestone ridge, the Sentier des douaniers or smugglers' path, which follows the French-Swiss border. This is a fairly challenging walk, but it offers magnificent views of the Swiss Jura.

This family hike takes you to the majestic Gros Chêne de Sondersdorf. Entirely in the forest, it passes through the Raedersdorf Discovery Trail, decorated with around fifty (or more) wooden sculptures and dotted with educational panels that are sure to interest children. Best done in dry weather in any season.If you only want to do the discovery trail and see the sculptures, see Practical Information.

From the castle ruins, you will climb up to the ledges where, like tightrope walkers from one border marker to the next, you will walk along the ridge line, neither in France nor in Switzerland. You will reach the Réclère Caves, considered the most beautiful in the world by the first explorers in 1886. From Journey to the Centre of the Earth by Jules Verne to Conan Doyle's The Lost World, you will squeeze between dinosaur feet. The return journey, via the old farmhouse at Montavon, will be less adventurous.

If you're looking for a quiet, cool spot (don't forget your long sleeves, even in summer), you've come to the right place... It's a fairly steep climb, but it's really pretty and peaceful. At the bottom of the gorges, you'll enjoy the cool air...

Kilometre Zero is the starting point of the front line established during theFirst World War. It is located on the current French-Swiss border, at a place called Le Largin. The Kilometre Zero trail explores three sections of the front line, the first kilometres of the French and German fronts, and the Swiss front at Le Largin, established along the border opposite the no man's land where boundary marker No. 111, considered the zero point of the Great War front line, is located.

Speaking of this part of the Sundgau, André Gide wrote:"One is constantly surprised, as one crosses the forest, to find oneself in the presence of an unsuspected sheet of water, mysteriously asleep in the shelter of the beech forests; rushes adorn narrow sandy beaches at the edge of large fields of water lilies. There are also several reminders of the First World War and the front line that separated Largitzen from Bisel.

Beautiful views, a lovely setting and an unusual part of the hike, crossing the death ladders.

The ladders will probably be closed until autumn. There are no danger points on these ladders. This historic site bears witness to the fear once inspired by these legendary places, the scene of many fatal accidents during the "bricotte" smuggling era, when the ladders were nothing more than tree trunks crossed by pieces of wood. Today, these comfortable family staircases, which you can climb safely, allow you to discover the Doubs Gorges from a number of viewpoints.

Are you only going to do one of these hikes? Then choose to explore this valley, a pure marvel! To start with, the Gorges du Doubs, which are full of sunny green beauty here. Then there are the light-filled forests towards Roche Guillaume and the mountain pastures, which overlook the valley. And the highlight: the Gorges de la Ronde, wild, lush and tropical in appearance, framed by high rocks, a world of stones, moss and ferns.

A picnic area with tables overlooks the Dessoubre valley at an altitude of nearly 750 metres. Old farms dating back to the 1960s cling to the mountainside. A wild valley where, perhaps, our Comtois Gauls performed their druidic rituals in sacred clearings. A natural rock known as the Devil's Castle overlooks the Waroly waterfall. Finally, caves carved out over centuries.

This short hike will take you to the Roman Theatre and the Mathay plain via a path with views over the Doubs and all the biodiversity associated with this coastline: dry and wet forests, cliffs, scree and ponds are home to many protected species. Play areas, picnic areas and facilities are dotted along the route.

A superb hike around Lake Moron, culminating in the Saut du Doubs and its 27-metre waterfall.

This is a small nature trail made by the city of Saint-Louis. It passes through the 3 of drinking water catchment points in the city where 535 cubic metres of water are pumped every hour and then stored in a 6000-metre-cubed tank. The trail has a dozen panels explaining the difficulties of supplying drinking water and the surrounding environments.

A trail giving you the possibility to explore a large number of running vineyards throughout the Bartenheim and Brinckheim hillsides.