car:

Via the A12->A13 motorways, Innsbruck-Süd/Mutters/Natters exit (Exit 3)
From Kufstein A12 motorway towards Brenner, Innsbruck-Süd exit
From Achenpass B181 federal road-A12 motorway towards Brenner, Innsbruck-Süd exit
From Kempten-Fernpass B314 federal raod-A12 motorway towards Brenner, Innsbruck-Süd exit (toll-free)

train:

Via Innsbruck main station - Stubaitalbahn train to Natters
(leaving every 50 mins.)
Lenght of trip: approx. 20 mins.

airplane:

Innsbruck Airport (8km) - Take a Taxi to Mutters (approx. Euro 20)
Munich Airport - By train to Innsbruck Main Station and then change to
the Stubaitalbahn tram to Mutters