From Munich / Salzburg or from Graz / Vienna:
Exit the B320 in Schladming Mitte (ÖAMTC building) and keep right.
At the second roundabout take the Rohrmooser Landstraße uphill. After about 2.5 km turn left at the roundabout. After approximately 1 km turn right into the Obertal, follow the Ahornweg. After about 8km you will find the Holdalm on your right.