The basis of the Doubs Nature Park is formed by the fascinating natural and cultural areas of the Doubs valley and the plateaus with their wide open woodland pastures and extensive forests. The area is dominated by horse breeding and livestock farming. Other jobs are provided by the watchmaking and the tourism industries. Goumois is also a small agricultural village, some of it located in Switzerland and some in France. The two parts of the village share their infrastructure, such as school and church and the Doubs River forms the border between the countries. Goumois belonged to the lordship of Franquemont for almost five centuries until it was abolished in 1780. Some of the ruins of Franquemont castle can still be seen today.

Along the paved road the walk leads to the mouth of the Bief de Vautenaivre stream. The path then continues on a gravel road. Past Le Moulin du Plain you reach Caborde pond. Nowadays it is difficult for amphibians to find a suitable spawning ground. To protect their habitat, six amphibian spawning grounds are provided on the banks of the Doubs River. They are of national importance and also include La Caborde pond with a length of nearly four kilometres.

Later, after about two hours, you get to Le Moulin Jeannottat where you have an opportunity to go for a swim. After a refreshing dip in the water, continue for another hour to reach today’s destination in the farming village of Soubey. An area of 13.5 km2 houses a population of only 120, which is primarily engaged in dairy farming and raising cattle. The mountainsides surrounding the village are up to 500 metres high. Many wetlands, 200 to 300 metres wide, are found along the river.