I have scoured the previous posts, but still have questions. We are traveling from Milan to Murren - 3 nights in Murren - then on to Paris. Two adults, two 15-year olds. I think we can get the Junior Travelcard for $30 and that covers all their travel. Correct? The 4 day BO Pass would cover us once we hit Brig on our way in and as far as Bern on our way out. I don't know that we'll be travelling during our 4 days in Murren. Maybe the Allmendhubel. Should my husband and I just buy full fare tickets to get to and from Murren and leave it at that? Thanks!
If you are not doing any traveling in Muerren, then there is no reason to get a 4-day Berner Oberland Pass.
You can buy discounted "Smart1" fares well in advance from Milan to Spiez for 28 EUR per person. The discount is more than the undiscounted child fare. https://www.trenitalia.com/en.html
You can also buy advance nonrefundable tickets well in advance for Interlaken Ost to Paris for about 100 EUR per person. The discount is more than the undiscounted child fare. https://www.sncf-connect.com/en-en/tgv
So now you only need to buy Swiss tickets for Spiez to Muerren, which are 34.40 CHF per adult and half price for under 16. and tickets from Muerren to Interlaken Ost, which are 23.20 CHF per adult and half price for under 16.
It is hard for me to imagine being in Mürren for 3 nights and not riding the gondola down to the valley at Stechelberg nor taking the train to Grütschalp and riding the gondola down to Lauterbrunnen. Plus there are the Schilthorn and Allmendhubel to visit. Are you sure? Otherwise you certainly have hiking you can do, enhanced in strenuous es by not taking transportation to/from elevation.
Thanks for the replies. The "4 days" is a typo. We'll have a restful evening on our arrival day, then have 2 full days before leaving on the morning of the fourth day. The consensus is 2 days of hiking, but I haven't looked at that much beyond taking the Allmendhubelbahn and doing the North Face trail back to Murren. Is there a good resource for these shorter trains and gondolas?
You may want to explore this site for clearer understandings of Swiss Travel Passes.
For Allmendhuebel, list pice is 14 CHF for a return ticket, so I ill assume 7 CHF one-way. Under 16 is half price. Scroll down here.
https://schilthorn.ch/en/Infos/Timetable__and__Tariff
Here is a map of the BO Pass coverage area.
https://www.berneseoberlandpass.ch/assets/Uploads/BLS-BO-Pass-M-23-WEB.pdf
If you want an excursion with great views and minimal energy use, you could easily travel from Murren to Grutschalp by train, down to Lauterbrunnen by gondola, up to Lauterbrunnen by train, then up to Mannlichen by gondola. Or you could take the train from Lauterbrunnen to Kleinne Sheidigg.
Thanks to everyone for the feedback and resources!