Start from the Grenouillère car park.
(S/E) Turn left, cross the RD660 and take Rue des Clérimois opposite for about 200m. At the crossroads, take the path that climbs to the left for 100m.
(1) Turn right and follow this path for 750m until you rejoin Rue des Clérimois.
(2) Sign: La gent ailée; turn left and continue along the road towards the first wind turbine.
At the hamlet of Belle Vue (water tower), take the path on the left, pass under the wind turbine and, after 220m, continue to the left.
(3) Sign: Au fil des eaux de la Vanne; continue for about 200m and turn onto the path on the right. Follow this ridge path for 2km.
(4) Walk past the signs about our crop companions. Continue.
(5) Sign about animals of all kinds.
(6) Sign about flying and crawling insects.
At the right-hand bend, turn left onto the long 500m descent (dangerous in wet weather).
(7) Pass the sign about chalk.
(8) Sign about the flora of dry grasslands.
At the bottom of the descent, turn right and walk there and back to the Arcades de Pont-sur-Vanne.
(9) Return to the crossroads and continue along the Aqueduc de la Vanne for 500m.
(10) Continue for 2.5 km, keeping the D660 at a distance, and rejoin the path you took at the start.
(1) Continue straight ahead, turn right onto Rue des Clérimois and return to the Grenouillère car park (S/E).