Gradual ascent to the Tête de Grouvelin (panoramic view of the massif) before reaching the thatch of Grouvelin (mountain inn) and starting the descent to the Lispach lake (lake-tourbière). Go up via the old copper mine to the Roche des Vieux Chevaux (viewpoint of Longemer lake) to return to the collet de la mine by the lower (high valley floor) of the mine. You then join the lake of Longemer which you follow until its north-western end, before attacking the ascent to the Roche Toussaint (view on Xonrupt-Longemer) then return to the forest to the base via the auberge de Grouvelin, the Hautes-Vannes and the Rayée.

In our practice, it is essential to respect the work of farmers, other operators and owners who welcome us on their land:

In order to prevent the herds from escaping, close all electric fences and do not damage them!

Also, do not disturb the herds, greet people with a friendly "hello", and of course take back all your rubbish! Don't cut routes through the meadows, don't picnic either!