Just leave your car parked
The regional buses of the Montafonerbahn run throughout the Montafon. The main lines run hourly from Schruns station.
From Schruns station you can reach Partenen by bus line 85. The stop is: "Mountain railways".
For the way back
You can return from Partenen to Schruns station by bus line 85.
mbs bus timetable
Arrival by train
The Montafonerbahn runs hourly (partly half-hourly) from Bludenz station. There are also direct connections from Lindau (D) and from Bregenz.
mbs train timetable