Departure: Chalet de la Source car park in Mouthe.
(S/E) From the Chalet de la Source, head south-west.
(1) Before the bridge, turn left and head up to the source of the Doubs.
(2) Turn left to rejoin the starting road. Turn left, go downhill and cross the bridge. Enter the peat bog area where you will find information panels. Continue, keeping the forest on your left, until you reach a tarmac road.
(3) Turn right, then 150 metres further on, turn right again onto a path towards a place called Le Moutat.
(4) At the next three-way junction (small farmhouse in the middle of the three-way junction), turn right, then 200 metres further on you will come to a pond in the middle of the peat bog, with ducks, frogs, etc.
Retrace your steps, turn right and cross the Doubs river to reach Mouthe. From the bridge on the downstream side, you can see a pretty little castle.
Continue towards the church, then turn right at the crossroads and continue for about 250 metres.
(5) Turn right onto the track that takes you back to the banks of the Doubs via theGR®5(red and white markings).
(1) At the road, turn left to return to the Chalet de la Source (S/E).