Davos – Sertig LoopFast & fun: A runners trail running tour→ 24km     ↑ 1220mΔ 2580M MediumΘ ClockwiseThis one is about as smooth and flowing as trail running gets. Starting in the back of the Sertigtal, a short and quiet valley south of Davos, the route sets out on steep trails into the Ducantal, a wide open landscape just one valley …