Whether you are coming from Bordeaux or Arcachon, after crossing the motorway bridge and passing the Cestas entrance sign, you will find a quiet, sheltered car park with space for around fifteen cars at the third roundabout on the main road (Route de Fourc).
(S/E) From the car park, cross the roundabout heading east and take Chemin du Graveyron, passing a small car repair garage. Cross the dual carriageway and continue straight ahead on a shaded footpath that leads to a roundabout.
Continue straight ahead to a crossroads, where you go straight on and walk alongside a primary school. At the end of this cul-de-sac, continue straight on along a path lined with tall cypress trees on the left, then a grassy area, until you reach a bus shelter. Cross the street and continue straight ahead along a footpath lined with houses on the right and a wooded area on the left.
(1) Opposite a cul-de-sac leading to this path, take the path on the left. After walking alongside a wetland area, turn right at a fork and, after a few dozen metres, you will come to a straight sandy track, which you take on the left. This track runs alongside a high-voltage power line.
(2) At the northern end of the housing estate on your right, you will come to a five-way crossroads. Turn right at a right angle through the forest, with the houses of the housing estate visible on your right. Cross an estey (small drainage channel) on a wooden footbridge and turn left, following the estey.
(3) Walk along a large field on your right where you can often see sheep. Take a path on the right that runs along the field at the edge of the forest. Continue along the field, making several right-angle turns between two hedges of brambles rich in blackberries in season.
(4) When the path along the field ends, take the path on the left that leads into the forest towards the east. After six or seven hundred metres, continue straight ahead at the crossroads and you will soon see the back of the Ajoncière nursing home.
(5) At the two posts, turn left and continue until you reach a clearing with a high-voltage power line. Cross this very sandy area and continue along the path under the pine forest opposite. In the middle of the maritime pine forest, continue until you cross the river (the Eau Bourde) and go to the Moulin de Rouillac, whose name is engraved on a slab at the edge of the path.
(6) Walk past the mill building on your left and cross the Eau Bourde again via a bridge and then a footbridge covered with perforated metal plates. Continue westwards along the Eau Bourde, on its right bank, until you reach a beautiful footbridge, which you take to cross to the left bank. Continue along this very pleasant path beside the river.
Staying on the path alongside the river, you will pass the water treatment plant, then cross the Ruisseau des Sources, which flows into the Eau Bourde here, via a wooden footbridge. Immediately afterwards, you will cross the Roman bridge.
(7) Just after the Roman bridge, you will find yourself on the right bank of the Eau Bourde, which you follow until you reach the road.
(8) Cross the road (at the pedestrian crossing) where it crosses the river via a bridge. On the other side, to the left of the bridge, you will find a path that descends along the Eau Bourde, which you follow on its right bank.
(9) You will arrive at Moulin de la Moulette, where you can go up to your left to pass in front of a daycare centre, walk past a few houses and return to the car park (S/E).