There are rather easy trail running routes at Bettmeralp, Flims, Suls and in the Jura (Gorges de l'Areuse)
Moderate routes can be found in Alpstein, Glattalp, Grindelwald, Klöntalersee, Le Moléson, Maderanertal, Pizol and Ritom
More challenging routes are available on the Brienzergrat, in Fionnay, Lenk-Iffigenalp, Lobhörner, Melchsee-Frutt, Val Ferret and in Zermatt