Heading towards Les Salins de Giraud on the D36, take the D36C towards L'Étang de Vaccares. At the first junction, turn left onto the Chemin de la Belugue. Park at the foot of Tourvieille.
(S/E) Take the path heading due south. Leave Tourvieille on your right.
(1) At the first set of locks (les Montilles), cross the two bridges and follow the path to the west.
(2) At the crossroads with the Machine du petit Rascaillon, turn left along the dyke that runs south of the building at the foot of which is an IGN marker.
(3) At the end of the Étang du Petit Rascaillon, take the left-hand path at a fork. At the next crossroads, turn right and pass to the south of the Gaze des Piquets. Follow the path, ignoring two other paths that go off to the left. After crossing a track coming from the right, cross the Pont Marine and come to a stretch of land with two major locks.
(4) Just after passing the second lock, take the track on the left. Follow the path (south-south-west) between Étang du Vaisseau and Étang de Beauduc. The path becomes a footpath.
(5) At the next lock, the bridge no longer exists. All you need to do to cross this tricky section is to go into the Étang du Vaisseau a little further (you won't get your feet wet, as the tongues of sand are clearly visible and allow you to cross in the dry). Pick up the path again and follow it south-east. Ignore the left-hand path that leads up to the Pont Marine and continue as far as the Pétroliers dike.
(6) Once on the dyke, the path widens considerably (semi-traversable road). Head due east again. Note the Machine du Vaisseau buildings in the background (including a curious white cube that stands out). The dyke slopes to the north-east before reaching the buildings.
(7) At the Machine du Vaisseau, turn right and head due north. Join the high-voltage power lines.
(8) Turn right (due east) and cross the Vieux Rhône. After about fifty metres, turn left onto the dyke (north-north-east) and follow it until you reach a passable road.
(9) Follow this road to the left, cross two tracks coming from the right and turn immediately left towards the Montilles locks.
(1) At the Montilles crossroads, turn right along the path you took on the way to the Tourvieille parking area (S/E).