On a sunny autumn day I made a beautiful hike over the Ducanfurgga. By postal bus I drove from Davos to the Sertig Valley. I started walking in Sertig Sand. 

The trail is really steep at 2,410 meters. At the upper end of the Ducan Valley you can see the Ducanfurgga Pass.

See also in German  http://www.hikr.org/tour/post4111.html