Start at Andlau at Sainte-Richarde Abbey (after the village centre towards Hohwald). Parking is available around the church.
(S/E) Return to the car park entrance, with your back to the Arthus hall, take the main road to the left, Rue Deharbe towards Hohwald.
After crossing the bridge over the Andlau river, turn right immediately and go down a few steps to enter the small alley leading to the "Sentier de la Grotte" (Cave Trail).
(If you leave the car park via the abbey porch, the bridge is just opposite.)
(1) At the next intersection, turn left onto the road that climbs up to Kastelberg, marked with a red disc.
After the last house, ignore a path on the right and continue uphill.
You will arrive at a cross, the first viewpoint with benches. After the cross, take a small path to the right to reach the gazebo at the top of Kastelberg (beautiful view of Andlau and Epfig in the background).
Go back down to rejoin the road (you can see Spesbourg Castle opposite). Continue downhill on the right.
At a bend, leave the road and climb up a path opposite (red signpost/direction Col du Crax) to rejoin a road to the left.
At a bend, ignore a path leading off opposite (see alternative route at this point) and stay on the main path.
At a fork, keep right downhill to pass above the Wiebelsberg vineyards, at the edge of the forest.
(2) At the edge of the forest, turn left onto a paved road uphill, via Herrenweg.
Further on, you will find the red rectangle sign (new route not yet shown on the IGN map).
When you return to the forest, at a three-way junction, keep right on the path, then further on to the left. (Look for the little figures in the trees, this is the Chemin des Espiègles).
At the crossroads above the houses, turn left onto the forest path, marked with a red disc.
Pass a reservoir.
(3) At the next crossroads, ignore the barrier on the right towards Barr, continue straight ahead for a few metres, then take a path on the left called Chemin des Espiègles, towards Crax.
Further on, ignore a path leading off to the left. Higher up, turn completely left, still following Chemin des Espiègles (ignore the sign for Château d'Andlau - follow the sign for Sentier du Crax).
(4) Further up, turn right down a slight descent, opposite the sign for Sommet du Crax (do not climb to the summit).
(5) At the Col du Crax, you will find yourself at the intersection of seven paths. Go straight ahead, following the blue triangle signs towards Rocher Sainte-Richarde. Keep right at the next intersection and, 300 metres further on, you will reach Rocher Sainte-Richarde on your left (beautiful view of Andlau).
(6) After Rocher Sainte-Richarde, retrace your steps and take the red ring trail on the left towards Château d'Andlau. At the Silberberg crossroads, turn right and then left onto the track and continue to follow the red circle markings.
(7) Reach and visit the Château du Haut-Andlau, exit the inner courtyard of the castle at the rear to walk around it on the outside. Leave the castle and take the path on the left towards the Château du Spesbourg.
Continue straight ahead, following the signs for "Route des châteaux forts d'Alsace" (red logo representing a castle), ignoring the paths on either side.
(8) Turn left towards Spesbourg (still following the castle signs). Pass two paths on the right and one on the left to reach a crossroads.
(9) Continue straight ahead, ignoring the path on the left, which will be for the return journey, and arrive at Spesbourg Castle, which offers a beautiful view of Andlau from the viewing platform. Visit the castle.
(10) Retrace your steps to the previous crossroads.
(9) Go down to the right, following the red signpost for Andlau; the descent is quite steep. Further down the descent, cross a forest road and make a quick left-right turn to continue on the path marked with red signposts. Arrive in Andlau via Rue des Carrières, which leads to the D425 (bus stop).
Continue left along the road. After the town sign, turn right, following the red-white-red "Sentier Adélaïde" signs, cross the river and enter the forest on the left.
At the next three-way junction, stay on the left path towards Rue des Moulins. When you leave the forest, keep left.
(11) After the intersection with Rue de l'Ungersberg, take a small path on the right, still following the red-white-red signs, which will take you to the Andlau (small waterfall), then follow the river.
The path leads to Rue Clémenceau. Follow it to the right, keeping the abbey bell tower in sight.
At the crossroads with the main street, turn right then left to reach the car park (S/E).