Unfortunately, we were at Interlaken in late April when either 2 weeks later the winter or earlier the spring. It was in the middle of nothing-to-do period. I was told from the guy from the bike rental shop, the summer guy, that the winter was over, implying no snow activity but spring was yet coming so no parashuting, hang gliding and other extreme stuffs as we expected to do. The only thing we could do was roller blading, hiking and biking.