St-Ursanne is also known as the “pearl of the Jura”. Especially attractive is the view from the four-arched stone bridge spanning the Doubs of the medieval town with its monastery and the church. Outremont offers two small museums, one dedicated to local fossils and the other to old agricultural implements. If the tenant, himself the creator of a few beautiful sculptures, isn't busy, he will be happy to open the doors for you.

Along a ridge, the trail takes you to a hill above Montgremay, with the verdant Ajoie, neighbouring France and the Vosges to your left and the Clos du Doubs, Chasseral and the Bernese Alps to your right. At La Caquerelle, the Musée du Mont-Repais tells the history of the Franco-Swiss fortifications in the Belfort Gap from 1871 to 2007. After passing Col des Rangiers and before the mountain hut of the Jura section of SAC, you arrive at Les Ordons, the highest point of the hike with magnificent panoramic views over Delémont, the city of Basel, the Black Forest and Alsace.

Don't miss the viewpoints of La Roche au Cerf and Grande Roche, before descending to the old Cistercian monastery at Lucelle. Surrounded by forests, the remains of the Cistercian monastery of Lucelle – founded in the 12th century – stand on French soil. You can still see the arch of a doorway, a fountain and the country house of Abbot Delfils. The village of Lucelle is located on a dammed lake formed by the river Lucelle (Lützel in German) with natural areas on its shores that you can discover as you stroll through them.