car:

Motorway from Munich - Rosenheim - Kufstein - exit Wiesing - Lake Achensee - Maurach - Pertisau
or
Munich - Holzkirchen - Tegernsee - Achenpass - Maurach - Pertisau (no toll fee!)

From Italy: Brenner - Innsbruck - exit Wiesing - Maurach - Pertisau

From Switzerland: Arlberg - Innsbruck - exit Wiesing - Maurach - Pertisau

train:

Train to Jenbach - bus or taxi to Pertisau (approx. 10 km)
Train to Tegernsee - taxi or bus no. 9550 via Kreuth, Achenkirch and Maurach to Pertisau

Transportation from Jenbach to Lake Achensee (Achenkirch, Maurach, Pertisau, Steinberg) & back is free of charge, if you show the driver the booking confirmation issued by your accommodation provider. For free transportation during your stay your accommodation provider will issue a ticket. Guests staying in Wiesing are also entitled to free transportation in the Achensee region.

airplane:

Innsbruck airport (50 km), Munich airport (140 km), or Salzburg airport

Or:
You fly to Munich or Salzburg and take a train to Jenbach and then take a bus*) or a taxi to Maurach am Achensee.