Roll out of Gruissan and let the ride unfold: first past the castle La tour Barberousse, then along the Étang de Gruissan lake. The route slips through the Narbonnaise en Méditerranée nature reserve and follows the Aude river before reaching the castle Château de Celeyran. It's 82.3 km with 427 m of climbing, almost all on paved surface, and it brings you back to Gruissan.
