Park near the pond in the village of L'Eguignac.
(S/E) Walk up towards the oldest houses in the village. Follow the road through the village until you reach the RD52, opposite the old mill.
Turn right, follow the departmental road with caution for about 400 metres and cross the Marche bridge over the Mes.
(1) Take the path that branches off to the left about 100 metres after the stream. It runs alongside the marsh, describing a wide curve. At the first crossroads, turn right to go up to Kertrait.
(2) Cross the RD52, continue straight ahead and then immediately turn right onto the path that leads to a horse farm. Pass the farm, taking the time to look down at the marshes below. Turn right and follow the path, which once again approaches the wetlands. It turns left when it reaches them, then follows the edge for about a kilometre. Climbing up the hillside, the path crosses some old quarries before coming out onto a small road.
(3) Turn right and follow the road to the village of Kerlo and its many thatched cottages. Cross the village and the next hamlet. A large building in the middle of the hamlet gave it its name: the Lion d'Or. As you might expect, it is a former hotel.
(4) When you reach the first houses of the village of Kermouraud, turn right onto the path that goes around a large property with a pond. Once you have passed the pond, turn right onto the path that first goes under the trees and then into the marsh. The path then turns into an alleyway of flat stones laid on vertical supports sunk into the marsh: this is the "Pont de Gras". Continue straight ahead for about 400 metres, then turn right.
(5) Amidst the reeds, you can barely make out the crossing over the stream, and you will find yourself back on dry land a few metres further on.
The path follows a hedge before opening onto a path lined with embankments that leads to the centre of the village of Gras.
(6) When you arrive, take a right-left turn towards a large agricultural shed. At the crossroads after this building, turn slightly right to reach the marshes.
When you reach the marshes, the path makes a 90° turn to the left. Follow it until you reach the confluence of the Crolières and Faillies Brières rivers.
(7) The bend next to the confluence marks the boundary between the brackish marshes (Les Crolières) and the freshwater marshes (Les Faillies Brières). You are now entering a small biological paradise, which you should visit with the utmost discretion. Several observation points allow you to see the animals that live there without disturbing them.
The route follows the edge of the marsh before veering off slightly towards cultivated land.
(8) When you reach a large farm track, turn right to go around the head of the marsh. Some sections can be tricky, especially if farm machinery has recently passed through.
When you reach the bottom of the thalweg, you will also find a carriageway that takes you back to the starting point (S/E).
