Yes, this is finally a very long trail, as you can see on the map! But forget to start from Jakobshorn and stop pedalling, this is a kinf of AM/Enduro path the never leaves you quit. The path is techincal also in the flat session, roots, rocks and almost always with a cliff beside. Don't be scared, is nothing that an AM biker can't do but that 615m of positive climb are tough.
The path starts from the top of the Jakobshorn and runs in and out from different valley. The tour is from A to B, at the end of the trail you can tae the train to came back to Davos. It's good to plan to ride the entire day.