Lake Davos (German: Davosersee) is a small natural lake at Davos, Switzerland. Its surface area is 0.59 km² and the maximum depth is 54 m. Fed by Flüelabach, Totalpbach and other mountain creeks, the lake is used as a hydropower reservoir, its water no longer flows to the river Landwasser but is channeled into the river Landquart at Klosters.