Route du Goden Marsh in Lanester

Parking available at the Marais de la Goden car park. Vieux Chênes bus stop nearby.

(S/E) At the entrance to the car park, at the barrier, cross the old railway line to reach the Ruisseau du Plessis.

(1) Turn left to walk alongside the pond. After the boardwalk and into the woods, turn right (three times), then straight ahead (twice) at the junctions. At the housing estate, turn right and continue straight ahead, then right onto the gravel track. At the boardwalk, cross the Ruisseau du Plessis.

(2) Turn left, then right to follow the road, walking on the hard shoulder (alternative route to the right recommended outside the hunting season). Turn right, then continue straight on to Kerléano.

(3) Continue along the road. Turn right, then left to cross Kerguer.

(4) Carry on and take the path on the right. Walk along the boardwalk which goes to the left (viewpoint on the right), then turn right and return to the car park where you started.

(S/E) Go straight ahead, take the pedestrian crossing on the left and turn left. Go straight on, cross the Pont du Bouc and turn right. Walk as close as possible to the Ruisseau du Plessis (always keeping right at junctions; there is a wash house and a fountain to see on the left). Cross the stream to the right over the old dyke of the Moulin du Plessis.

(5) Turn right and continue along the footpath (three times to the right), then straight on through the woods (twice) before turning right to follow the old railway line. At the road, turn left, then take the pedestrian crossing on the right to return to your starting point (S/E).

This route is provided by Lorient Agglomération

This route is included in the Morbihan Departmental Plan for Walking and Hiking Trails and is certified by the French Hiking Federation. You can follow the yellow markings. There is an information board with a map and details of heritage sites at the start.

Alternative route available at (S/E): Except on hunting days, you can turn right and cross the marsh (5.2 km alternative route). Continue straight ahead at the crossroads and return to the car park on the right. Go straight ahead, take the pedestrian crossing on the left and turn left.

- Goden Marsh: a Sensitive Natural Area in the Morbihan department, comprising 22 hectares of sustainably managed wetlands and brackish marshes.
- Bois de la Goden: native and introduced species.
- Ruisseau du Plessis: named after the former seigneury of Plessis, it rises north of Caudan and served as a natural boundary when Lanester was founded in 1909.
- Reed bed: common reeds or Phragmites growing thanks to the supply of fresh water from the stream.
- Mudflats and salt meadows: halophilic plants adapted to brackish environments.
- Kerguer: a farm dating from^{the 17th} to^19th centuries.
- Pont du Bouc: built by the engineer Cocher in 1931.
- Toul Bahado wash house and fountain: wash house rebuilt in 1923.
- A mosaic of habitats suitable for birds: resting, feeding and nesting areas for passerines and waterbirds.
- Dike and leat of the former Plessis tide mill (^16th century): converted in the^19th and^20th centuries; the mill was destroyed in 1933 (by fire) and 1942 (during Allied bombing), and replaced by a textile factory, then housing.
- Confluence of the Plessis and the Blavet estuary
- Disused railway line: served the Rohu industrial estate, established in 1973.