The car park is located at the end of Chemin du Moulin in Puy-Sainte-Réparade (Bouches-du-Rhône), after the waste collection centre.
NB: the outward and return routes deliberately do not overlap, so you can take a different route on the way there and back, especially as you can observe both the gravel pits and the Durance river. In addition, the side paths provide access to viewpoints.
(S/E) First head east, straight along the tarmac track to the start of the second pond on the right.
(1) Then leave the track and take a path on the right to go around a pond whose banks have been fitted out with pontoons, steps and footbridges. There are crayfish, beavers and cormorants, among other things. At the end of the pond, cross the curved pontoon – this is why the GPS track seems to show you walking on water! After the pontoon, follow the sandy path that leads back to the car park.
(S/E) Head west, keeping to the left of a hedge. Pass between the blocks on the left (do not follow the dyke track that passes under the portico) and follow the fascines (wood stacked between posts) to the point marked "Observatory". Then take the path along the edge of the pond, at the foot of the dyke. You may see swans and egrets, among other birds. At the end of the pond, the path climbs back up to the track.
(2) Observe the weir on the Durance. Continue along the tarmac track and then the dirt track, keeping to the left. When you reach the dyke, perpendicular to the Garde path, continue straight ahead (do not turn left towards the observatories, which are poorly positioned for observation).
(3) A few metres after the fishermen's car park, stand on the left at the edge of the platform to observe the silted gravel pit, which is home to many birds, including ducks. Continue along the track, cross the gravel pit spillway and stop when you overlook a branch of the Durance on your right.
(4) Observe the density of ducks in this silted-up branch of the Durance. Return straight back along the track to observe the Durance side and for more elevated views of the gravel pits' ponds. This will take you back to the car park (S/E).