After we noticed during a short trip that some mountain bike routes of Switzerland Mobil are also ridable with our tandem, we dared to ride one of these routes last Sunday:

We rode on the Alpin Bike (national MTB route 1) from Frutigen to Adelboden. The route was extremely steep shortly after Frutigen.... just under 20%.

After this first hurdle was overcome, it went further up, no longer so steep and also with some short descents. We also rode on two short single-trail sections that we could master well without luggage.

Since we could start late in the morning due to a Piket mission, we then decided to turn around in Adelboden and ride on the main road downhill to Frutigen instead of as actually planned over the Hahnenmoos in Lenk.