From the parking lot of the chairlift in St. Sebastian (you can also park at the parking lot of the supermarket), turn right after the Dietl inn into Habertheuerstraße. Follow this road until you reach the Mitterbach/Mariazell turn-off and follow the signpost 692 along a forest road until you reach the Habertheuer saddle (1015m). Here, turn right onto trail 694 and walk a short distance along the Drei-Seen-Blick trail to the Edelweißhütte and then to the mountain inn.
We reach the valley either by foot (on trail 694 directly to Mariazell) or we keep to the right after the mountain inn and hike along the forest road (in winter bypass FIS 1, in summer mountain bike trail to the Bürgeralpe) down to the valley again to St. Sebastian. Or we take the cable car to Mariazell and then hike along the Rosary Trail out to St. Sebastian.