Park in Sewen square, next to the church.
(S) Follow the road towards Ballon d'Alsace for 50 metres.
(1) Take the bridge on the right. Follow the Seebach stream, taking the small path on the left after the bridge. Follow the blue rectangles. The path quickly joins the shores of Lake Sewen.
(2) After the lake, walk along marshy ground before climbing up to Lake Alfeld.
(3) Return to the starting point via the same path in the opposite direction, until you reach the car park (E).