Pfetterhouse walks

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.

Climb up to Roc au Corbeau, which straddles the French-Swiss border.

The hike has been modified and no longer passes by the Ferme de la Vacherie. A lovely little walk, mostly on fairly wide paths, leading to beautiful viewpoints and sites of historical interest such as the Mannlefelsen caves and Morimont Castle. There is a slight incline on the first part of the route to add a little spice to this easy hike.

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.

Friesen boasts an exceptional array of half-timbered houses built between 1499 and 1876. Thanks to meticulous inventory work, the walk allows you to see many reminders of a rural world that disappeared forever after the Second World War. A country lane then leads to the Notre-Dame de Grünenwald chapel and Ueberstrass, following in the footsteps of the Knights of Malta.

According to Marc Glotz, "The Sundgau has only two Romanesque churches, both founded by the dynasties that shared the region in the Middle Ages: the Habsburgs and the Ferrettes. While Ottmarsheim evokes Carolingian grandeur, Feldbach recalls monastic simplicity. You leave it as if returning from a pilgrimage, with a renewed sense of serenity and the impression of having encountered the fleeting shadows of the counts."

This hike allows you to discover parts of the region's history during the Second World War, in the context of the liberation of Alsace, by following part of the Sentier des Marocains (Moroccan Trail). It also allows you to discover magnificent landscapes in the Swiss Jura, the Sundgau and the foothills of the Vosges and the Black Forest, then to follow the source of the Ill on your return to the starting point.

The walk leads to the heart of the Glaserberg massif, above Winkel. You will cross the Saint-Pierre State Forest to Neuneich, where you can enjoy sweeping views of the Alsatian Jura.

This second stage begins in France and rejoins the Jura trail at the Ébourbettes farm. You will walk along a border path and, at Roc au Corbeau, enjoy a view of Alsace. Until Vendlincourt, you will walk through alternating pastures and wooded areas. Before arriving in Porrentruy, you will enjoy an open-air exhibition of wooden animal sculptures. Don't miss a visit to the historic town of Porrentruy and its castle.

The walk begins at the site of Lucelle Abbey, isolated from the hustle and bustle of the world. The monastery was once a shining beacon and its history can still be seen in the few remaining buildings. From here, a Swiss getaway allows you to discover a curious rock shelter suspended above the river's source. You then climb back up to the plateau overlooking a valley enclosed between two wooded ridges and crossed by the winding waters of the Lucelle.

This is a pleasant hike where you will come across old farms and large boundary markers marking the Swiss border through a beautiful pine forest and, above all, the Abbaye de Lucelle, better known today as the "Centre Européen de Rencontres" (European Meeting Centre).

Hirtzbach is well worth a visit. The castle, English park and opulent residences of Unterdorf are neatly lined up on either side of the stream, whose banks are beautifully flowered in summer. Along the way, a rural and wooded detour leads to the site of the vanished village of Sankt-Glückern and the Landfürstenweyer, the Princes' Pond, with its still waters.

During this third stage, you will cross the historic town of Porrentruy. As you leave the town, the path runs along the edge of the woods before starting the climb to the Chalet des Chainions (Chalet des Amis de la Nature). The route then continues along a ridge before descending towards the hamlet of Seleute. As you approach Saint-Ursanne, you can admire the Clos du Doubs and its rocky massifs. You will enter the historic town of Saint-Ursanne through the Porte Saint-Paul.

The peaceful village of Pleigne is located on a Jura plateau at an altitude of around 800 metres. It is the centre of a commune that stretches north to the French-Swiss border marked by the Lucelle, the river that gave its name to the lake and the small town famous for its Cistercian abbey.The route begins with the Pleigne panoramic trail and observation tower, then leaves the plateau, its pastures and farms, to descend around Lake Lucelle. Return along the river, passing close to the caves, to climb back up to the plateau through the Côte de May forest and its legendary Rocher de la Fille de Mai (Rock of the May Girl).