72625 posts
Hi Mohammed, and welcome to MySwissAlps!
>> I have bought the 8 day Swiss travel pass…does it cover my train travel from Geneva to Montruex and then Montruex to Interlaken OST free of charge?
Yes. You can read more about where the Swiss Travel Pass is valid for free or discounted travel, and download a validity map, from the following page. Make sure to read the legend on the map, and zoom in for better detail of the routes shown if necessary.
http://www.myswissalps.com/sw isstravelpass/validity
>> Do I need to reserve a seat?
Seat reservations are optional, but recommended on the Montreux-Zweisimmen sector (except in the low season), due to the popularity of this sector.
If you choose to make a reservation, you can do so here:
reservations.mob.ch/re servation/reservation/ reservation/reservatio n/reservation/reservat ion/reservation/reserv ation/reservation/rese rvation/f?p=151:1:26409955645551 57::NO:::
Change the language at the top right of the page if necessary.
Alpenrose