Apr 9, 2017 - 9:41 PM
in reply to Grant29
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Alpenrose has provided a comprehensive answer about the Jungfrau region.
I can add that late May is "between seasons"...lots of snow or snow slides blocking trails above 2000 meters, and probably above 1500 meters. The snow is of poor quality for skiing. So, few skiers and few hikers. Therefore, many hotels and restaurants ( but not all) will be closed. As you can see from Alpenrose's post, some of the mountain transport just starts running for the "Summer ;-) " season when you arrive.
When I go to Switzerland in May, I go to the areas at lower altitudes. My favorite for pleasant hiking with mountain views is the area around Lake Lucerne.
Here is a description of some walks around the southern end of the lake; it includes part of the "Swiss Path" (der Weg der Schweiz). Also, several images in the thread. As noted, it is a very different experience compared to the Jungfrau region.
Pilatus is close, and Titlis is accessible....there are some "decent" mountains. ;-)
The city of Luzern is nice, too. Especially the old town. Note that I use the German spelling...Luzern is in the German-speaking region, and that is what you will see on signs nearby. Pronounced the same.