Green Trail at Jungfrauenweg

I can only confirm LR's guess! And the singletrack end is not only beautiful, but also fun - narrow along the slope, interspersed with small roots, a bit high and very much down.
In order not to miss the part, keep right on the transverse tree trunk!
However, the climb to the big valley before it is always a challenge. With enough momentum but also without "moped" feasible.
The reason of this depression, but especially the further back, is sometimes muddy / wet. But you always get along well.

Beautiful singletrack with a lot of flow along the slope. Kickers, a very tight bend with residents and the passage of a small riverbed paired with great views from the hillside make this nature trail.The entry is easy to find.

End of the Green Trail on Jungfrauenweg.
Turn right at the transverse tree trunk.
(One hardly believes it, but at "dry times" there is no "river" 😉)