Getting there on public transport is really a challenge, but it can be a fun and beautiful one!
Then there are buses to Geiranger on some of the worlds most beautiful roads!
The fastest way is to fly to Ålesund and rent a car!
Falun or Lillehammer makes no sense unless you are driving all the way.
(wich i intend to do this summer!)
Ålesund is a super nice town to start from!
Please also post in the Norway forum!