Jun 29, 2017 - 9:15 AM
in reply to Uallin
The train trip from Lauterbrunnen to Wengen or Grindelwald is free with the Swiss Travel Pass (as long as you don't go via Kleine Scheidegg).
If you are looking at the black dotted line near Wengen, that is the cable car from Wengen to Männlichen and the gondola from Männlichen down to Grindelwald. With the Swiss Travel Pass, you get 50% discount on both.
The red dotted lines are the train routes from Wengen and Grindelwald to the Jungfraujoch via Kleine Scheidegg, for which you get a 25% discount.
If you travel from Wengen to Grindelwald via Kleine Scheidegg (or vice versa), you get a 25% discount, but if you travel between those two places via Zweilütschinen, it is free.