Apr 12, 2018 - 12:04 AM
in reply to charwinelove
>> Jungraujoch exercusion ... Do I also need seat reservation
As rockoyster mentioned, you do not need a reservation.
However, July is peak period for the Jungfraujoch, and it will be extremely busy. If I were to do that trip in July, I think I would make a reservation. You would most likely get up there eventually without a reservation, especially if you started out early in the day, but might have to wait a long time in a queue.
Reservations are only available for the final sector of the trip, from Kleine Scheidegg to the Jungfraujoch, and must be made for a return journey. This then commits you to a particular train both up and back. A return reservation will cost CHF 10, and is not for a particular seat, but for the "reserved seats" carriage, which is separate from the carriages for people without reservations. There will be signs to direct you to the appropriate carriages depending on whether or not you have a reservation.
Reservations - once made - are not refundable and can't be exchanged for another date or time. So don't buy it any earlier than the day before, after checking the weather forecast and satisfying yourself that the weather will be clear. You can get reservations from any staffed railway station in the Jungfrau Region, e.g. Wengen, Grindelwald.
Weather can be checked here: