Departure from the car park located on Route des Étangs de Hollande, north bank of the ponds (see access in the practical information).
(S/E) Take the Chaussée du Pont Royal, which crosses between the Étang de Saint-Hubert to the east (on your left) and the Étang de Pourras to the west (on your right). Pass the old Pavillon de Pourras, now in ruins.
(1) At the end of the road, turn right and walk along the fields.
(2) At the Croix Vaudin crossroads, take the path on the right (north-west).
(3) When you reach a small road, follow it to the right (north; Chemin de la Canarderie).
Cross the bridge separating the Corbet ponds to the west (on your left) from the Pourras pond (on your right), then continue straight ahead and walk alongside the Villarceau farm.
(4) About 100 metres after the farm, turn right onto the Corbet forest road.
At the Corbet crossroads, continue straight ahead.
(5) About 150 metres further on, turn right at the crossroads. At the end of the road, turn left onto Route des Étangs de Hollande to reach the car park (S/E).
See reviews. It seems that the circular is no longer possible. Please leave a comment to confirm.