Swiss Railpass Suplement??

[pala4833]

Hi,

I will be traveling through central Europe using a 21 day Saverpass with my wife. I would like to explore Interlaken/Gimmelwald and all the lifts and fernunculars.

Is there a Swiss Card or something, that will supplement my RaillPass, which gives me discounts or covers fares for these lifts, fernunculars, and private rails? Who issues it, and what's it called?

I'm hoping to combine this with Austrian-style hut-to-hut hiking. Anyone having anything to share would be greatly appreciated. Our scheduling is still flexible, what's the earliest in the year this area is viable for hiking over skiing?

thanx.