From Munich-Salzburg: Take the Tauern Autobahn until you reach the Ennstal (Enns valley) junction, take the exit towards Graz (Radstadt), continue for a further 45 kms on the B 320 road until you reach Gröbming.
When you reach Gröbming follow the signs to amadeus.
PFrom Passau or Vienna: Stay on the motorway via Linz-Wels until you reach the "Voralpenkreuz" junction. Continue on the Pyhrn Autobahn towards Graz until you reach Liezen. Take the exit towards Schladming-Salzburg and continue for about another 35 kms until you reach Gröbming. When you reach Gröbming follow the signs to amadeus.