Getting there: Semmering and Mürzzuschlag are easily reachable by train from Vienna and Graz, see http://fahrplan.oebb.at/bin/query.exe/en?.
From Mürzzuschlag Busbahnhof there is Post-Bus 180 going to Semmering Europasiedlung (16 min ride). It departs Thursday at 12:05; see also http://fahrplan.oebb.at/bin/query.exe/dn?L=vs_postbus&
Alternatively, when arriving in a group we may be picked up by the hotel from Semmering Bahnhof. A walk is 40 min.
If you arrive by car, there is free parking in front of the hotel.