Every winter there are several large avalanches in the Feldberg region. The mountainsides of the Zastler valley are particularly prone, but they also occur on leeward slopes like the Feldseekessel at Seebuck, the Herzogenhorn and the Baldenweger Buck. Snowfall driven by western winds forms cornices on the downwind sides of ridges (e. g. the Zastler Wechte), which can break off. Several fatal avalanche burials have happened, the last in January 2015 which left two dead.