Altrier belongs to the Mullerthal region in Luxembourg's east — rocky passages, shaded woods and quiet field sections take turns on this loop. The route measures 12.7 km — about 3½ hours of walking, depending on pace. The route gathers about 120 m of ascent, and most of the way follows forest and field tracks.
On the route: Kuelscheier Felsspalten. Like every Auto-Pédestre, the loop is permanently waymarked with the blue symbol and can be started at any point.
