Luc is a commune in the Lozère department in southern France. The village of Luc is overlooked by the castle-ruin of Château de Luc. Th…Luc is a commune in the Lozère department in southern France. The village of Luc is overlooked by the castle-ruin of Château de Luc. The Robert Louis Stevenson Trail, a popular long-distance path, runs past the chateau and through the village.