Explore hiking trails around La Seyne-sur-Mer, Provence-Alpes-Côte-d'Azur. The best hike near La Seyne-sur-Mer is Dalle de la Conversation Loop via Avenue des Calanques, a 5.7 mile loop in Parc national des Calanques (aire d'adhésion). La Seyne-sur-Mer has population 62987.0.