The Preda-Bergün sled run is a bit flat in some places but some of the best scenery i've seen.
http://www.berguen-filisur.ch/erlebnisse-aktivitaeten
We got to the bottom and took a chair lift up and did the Darlux-Bragün - the fastest one in Switzerland.
http://www.berguen-filisur.ch/erlebn...x-berguen.html