(S/E) Park on Rue du Moulin au Bois, cross the dam and turn left until you reach the first path on the left.
(1) Take this path between the gate and the wall on the left, which leads to the Trouille river and Rue de la Genièvrerie. Turn right and follow this road until you reach a chapel.
(2) Turn left and continue straight ahead on this road.
(3) When you reach the restaurant Le Vieux Puits, take Chemin de l'Ermitage, which curves sharply to your right. Follow it until you reach a T-junction.
(4) Turn left and continue until you reach a crossroads.
(5) At the end of the path, turn right towards Bois Là-Haut or Bois de Mons, follow the path that crosses it and descends towards Chemin de Bethléem.
(6) Turn right and follow the paved path that takes you back to the waterfall. At the end of the walk, enjoy the small waterfall park (S/E).

I'm glad you enjoyed the walk. I just did it again recently. Have a nice day.