From the Thurntaler mountain station via route 10b to Äußere Hochalm. Continue on route 10 to the mountain ridge. The summit is to the right, Astatt Sattel is to the left. From there continue via route 4 down to Hintere Hochalmhütte on the Villgraten side. On route 10b via Hofilet Alm back to Thurntaler Rast, to Gadein mountain restaurant and back to Thurntaler mountain station.
This hiking route is also possible to do from the hut Thurntaler Rast (with car reachable).