Unmissable hike: a breath of fresh air and unforgettable memories of the Jura! One of the most beautiful hikes in the Haut-Jura with its exceptional panorama from Roche Bernard, on the lakes plateau, the Mont Noir forest and the Biel valley. The lakes and peat bogs of Bellefontaine and Les Mortes represent an ecological context of very great value with their characteristic vegetation of the boréo-arctic type. These lakes are among the highest in the Jura. Trails sometimes steep, requiring some physical condition.