Park in the car park at Lake Alfeld.
(S) Cross the dam and start climbing up the path marked with red Xs at the end of the dam.
(1) On the way up, on the left, take a detour to see the Wasserfall waterfall (it's worth the short walk). Return to the trail marked with red Xs.
(2) At the end of the switchbacks, you will arrive at the Wasserfall refuge. Continue left, passing by the Rundkopf.
(3) At the next intersection, begin the descent to the left, following the red X (ignore the blue circle that climbs up to the Ballon d'Alsace). The descent continues steeply until you reach a pretty clearing, where the trail continues with a slight incline to the Club Vosgien du Boedelen refuge. Continue on a path to the left until you reach the road, leaving the red X sign on your right, which climbs towards the ski slopes.
(4) There, follow the red round markings opposite, which cross the D466 and follow them until you return to Lac d'Alfeld (S/E).
