Arrival from Vienna:
A2 to Hartberg, B54 direction Graz to junction Pöllau, Birkfeld. After Pöllau turn left to Birkfeld about 15 km.
From Graz: A2 to Gleisdorf exit, B64 direction Weiz. Traffic circle before Weiz on the B72 direction Anger, Birkfeld. From Weiz about 25 km.
From Salzburg: S6 via Bruck, Kapfenberg to exit Allerheiligen im Mürztal. Immediately after the exit turn right towards Fischbach, Birkfeld. Approx. 35 km via Schanzsattel to Birkfeld.
Detailed information on how to get there can be found here.