Take the Knittelfeld OST exit and continue in the direction of Rachau or St. Margarethen bei Knittelfeld and then turn right onto Gleinstraße in St. Margarethen. We recommend that you always stay in the direction of Rachau bei Knittelfeld, as the access road to the Rachau treetop hiking trail is located near the Rachau town entrance/exit.
When entering "Mitterbach 25", most navigation systems will guide you to the Wipfelwanderweg via a somewhat longer and more complicated route. We therefore recommend entering the address "Rachau 97" (= Rachau municipal office), as this will take you directly to Rachau and you will then be able to follow the signs to Gleinstraße and the turn-off from there to the Wipfelwanderweg Rachau.