The start and finish of this hike are at Frontignan station.
(S/E) On leaving the station, head south towards the drawbridge.
(1) Cross the Rhône-Sète Canal via this bridge, turn left and follow the canal. Pass under the railway line. Leave Avenue du8e Régiment d'Infanterie on your right and, after about 20 metres, you will come to the start of a footpath.
(2) Follow this footpath, which is shared with cyclists, to the Rond-Point des Étangs roundabout, just before another canal. Go around the roundabout on the left.
(3) Cross the canal and reach the edge of the Étang des Mouettes, following the various passages of this cycle/footpath.
(4) Stay on the path between the Étang des Mouettes (on your right) and the Étang d'Ingril (on your left). You will reach the harbour master's office and the small port of Frontignan.
(5) Stay on the cycle/footpath and continue to the end of the Étang d'Ingril. Take the small footbridge to cross over to the Mediterranean Sea side, at Plage des Aresquiers.
(6) Turn left towards the bridge that crosses the Rhône Canal in Sète. About 400 m after the bridge, carefully cross the D114 and head to the entrance of a car park.
Yellow markings
(7) At the end of the car park, take the path marked Les Aresquiers on the OSM map. Follow the yellow markings and, at a crossroads, take the right-hand path heading north-west into the forest. Catch up with a fork in the path.
(8) Turn left and keep heading south-west as you approach the pond. Follow the most obvious path and return to the north-west between the marshes on your left and the vineyards on your right. You will come to a crossroads.
(9) Turn left, heading due west, and follow a raised path to reach the edge of a former salt marsh.
(10) Walk along the basin to another crossroads.
(11) Turn left and walk naturally along the marsh until you reach a track suitable for vehicles.
No markings
(12) Leave the yellow-marked marsh path on your right. Continue straight ahead towards the track that runs alongside the canal and curves at a 90° angle. Continue to the bridge under the D612.
(13) Pass under the road, follow the railway line along Chemin des Pielles and then Chemin des Cheminots, continue to a bridge under the railway line at the corner of Rue du Bassin.
(14) Turn right onto Rue du Bassin, pass under the railway line and finally turn left onto Boulevard de la République to return to Frontignan station (S/E).
The first part of the cycle path is interesting because it runs alongside the pond. But it also runs alongside the road... The part in the forest is more interesting.