Park in the small car park at Les Sources de la Seine.
(S/E) Head down into the park at the developed site, which is crossed by theGR®®2path (red and white markings). Follow thisGR®®2to the right, heading south, until you reach the D103 road. Take this road to the right for 40 metres and then turn left off it, following theGR®® as it heads into a wooded valley (the Combe aux Arnauts). You’ll come to a crossroads where an old stone marker, triangular in cross-section, bears the inscriptions ‘Bligny, Saint-Germain, Poncey’.
(1) Leave theGR®® by turning right, heading west-south-west, onto the yellow-marked path which leads to a road 900 metres further on. Turn left for 150 metres, then cross another road leading to Blessey before entering the forest again. Walk for about 700 metres, still following the yellow markings, until you reach a junction.
(2) The yellow trail branches off sharply to the right, heading north. Leave the yellow markings here and head straight down the path leading to the bottom of the valley where the Bonnevaux stream flows. Cross the stream via two planks and climb up the opposite side of the valley. At the three-way junction, take the left-hand path uphill to reach, 50 metres further on, a large clearing where the former Hermitage of Saint-Jean de Bonnevaux stands.
(3) Turn right, heading north, onto the path marked in yellow, passing above a pumping station. At the junction just after this, do not go up to the left but take the roughly level path on the right, which then passes near a spring. At the next crossroads, go down to the right, then turn right again and immediately left. Continue downhill to the spillway of a beautifully landscaped pond.
Cross the stream via two planks and follow the path along the right bank for 250 metres until you reach a junction.
(4) Leave the banks of the stream and immediately turn left to climb rapidly up a ridge heading north-west, then due north. The path emerges from the forest at the top of the climb and heads north-west across the open plateau. It joins a good, carriageable track, which you take to the left and follow straight on to Blessey.
(5) In the village, head down to the left of the wayside cross to visit the washhouse, restored by the Swiss artist Rémy Zaugg.
Then head back up to the right of the wash house, turn left as you pass beneath the church and finally leave the village via the D103C road.
(6) Just after a wayside cross (the Croix des Charmes), leave the road and follow a well-maintained track to the left leading to Saint-Germain, passing through the bottom of a small valley with a pond. Cross this village from west to east, first following Rue du Lavoir and then Rue de Griande.
(7) Take the path that runs to the right of the water tower (yellow markings are still present, but barely visible). In the fields, turn right then left and head down into the Seine valley, where you’ll join theGR®®2.
(8) Turn right onto theGR®®, which takes you back to the Sources de la Seine (S/E).