Promenade découverte: the short first visit
Start at the signed departure for the three walks beside the Maison at Grand Castélou and follow the Promenade découverte back to the buildings. Its published length is 1 km. Allow 30–45 minutes to compare wet meadow, salt meadow, reedbed and salt-tolerant scrub. Use the current on-site route board to identify the loop rather than following an old download with different trail names.
A short distance does not establish an accessible surface. Ask about mud, thresholds, slopes and the width of any crossings if using a wheelchair or pushchair. Keep the return flexible after rain.







