Is a reservation with a public transport ticket necessary for the ascent ?

Yes, during the summer season, in addition to your public transport ticket, you must ascent a time slot (known as a boarding pass) for the ascent . This allows you ascent avoid waiting times and secure your ascent, even with the SBB app. Without a reservation, you may experience waiting times and, in exceptional cases, transportation may not be possible. Public transport ticket: Purchase directly via the public transport channel, e.g., SBB app. Reserve a time slot for the ascent a valid public transport ticket here