Hi Fatimah, and welcome to MySwissAlps!
>> So, on the website, it said that SDP is valid for every transportation like train, bus, and metro. But I'm confused about the covered routes, especially in Jungfrau region because some people said there are some mountain railways that is not covered by SDP.
Yes, the Saver Day Pass basically covers transport between cities, towns and villages, but (with very few exceptions) doesn't cover mountain transport at all (not even for a discount). One exception is the Rigi (near Luzern), for which both the trains and the cable car are covered.
https://www.myswissalp s.com/onedaytravelpass /details
>> Does it cover the routes from Geneva-Interlaken ost-Schynige Platte-Lauterbrunnen-Murren-Kleine Scheidegg-Grindelwald?
It covers the route from Geneva to Interlaken Ost, and from Interlaken Ost to the villages of Grindelwald, Lauterbrunnen, Wengen and Mürren. https://www.myswissalp s.com/jungfrauregion
It doesn't cover Wilderswil to Schynige Platte, or from Grindelwald or Wengen to Kleine Scheidegg and the Jungfraujoch. It doesn't cover any mountain transport in Mürren (Allmendhubel funicular, cable car Mürren-Schilthorn), Wengen (cable car to Männlichen) or Grindelwald (cable car Grindelwald Grund to Männlichen, gondola to First) either. Those are mountain routes, and you would have to pay full fare.
>> Or do you have a better one-day itinerary for scenic routes in Jungfrau Region that is fully covered by Saver Day Pass?
You could just travel to the villages of Grindelwald, Lauterbrunnen, Wengen and/or Mürren. All of those villages are in a setting of great scenic beauty. To travel between Grindelwald and Wengen, you would have to travel on the train via Zweilütschinen, not the train via Kleine Scheidegg or the cableways via Männlichen.
If you also buy a Swiss Half Fare Card for CHF 120, you can get 50% discount on mountain transport, as well as getting the Saver Day Pass at a lower price.
Depending on the rest of your plans in Switzerland, another type of pass might be more economical. There is detailed infomation here that you might find useful:
www.myswissalps.com/tr ain/ticketspasses/prac tical/chooserailpass
Saver Day Pass PDF validity map
Routes on which travel is free with the Saver Day Pass are shown as solid lines. You have to pay full fare on routes shown by dotted lines, except if you also have a Swiss Half Fare Card - in which case you will get a 50% discount.
www.sbb.ch/content/dam /sbb/de/pdf/abos-billette/abonnemente/g a/karte-geltungsbereich-ga-halbtax-stand_d_barrierefrei.p df