The park's winter flooding, or 'les grandes eaux', can submerge large swathes of grazing land, creating a vast temporary inland sea.
It is a crucial refuge for the Common Crane, which uses the wetlands as a staging area during migration.
The landscape is defined by the 'bocage' structure, a mosaic of fields enclosed by thick, historic earth banks and hedgerows.
The park operates a specialized 'Maison du Parc' that serves as a central hub for environmental education and regional heritage.
It supports one of the most significant otter populations in the Normandy region.
The Parc Naturel Régional des Marais du Cotentin et du Bessin encompasses 146,000 hectares of wetlands, meadows, and hedgerows in Normandy. The park serves as a primary stopover for migratory birds, including geese, ducks, and waders, navigating the Atlantic Flyway. It is characterized by the 'marais' landscape, which experiences seasonal flooding known as 'les grandes eaux' during winter. The park administration is based in Carentan-les-Marais and manages conservation efforts across 150 communes. It maintains a network of marked trails for hikers, cyclists, and equestrians. The ecosystem supports significant biodiversity, including rare plants like the marsh gentian and insects like the damselfly. The park incorporates history, as it contains numerous sites relevant to the 1944 Normandy Landings.
The observation platforms at the 'Espace Nature' near the Maison du Parc.
Bring high-quality binoculars, as the best birdwatching spots are often located at a distance from the walking paths.
Check the tide and seasonal flooding status at the visitor center before planning a hike, as certain paths may be impassable.
Wear waterproof, sturdy hiking boots, as the wetland terrain remains muddy even during drier months.
Trying to traverse the marshes during the peak of the winter flooding season without local guidance.
The Maison du Parc exhibition areas are closed during the winter months.
Maintain silence near observation blinds, avoid straying from marked paths to protect nesting grounds, and keep dogs on a leash.
