The Saastal or the Saas Valley is an alpine valley in the district of Visp, in the eastern part of the Canton of Valais, Switzerland. It is the valley of the river Saaser Vispa. It is separated from the Mattertal to the west by the Mischabel massif. Villages in the valley are, upstream, Eisten, Saas-Balen, Saas-Grund, Saas-Fee and Saas-Almagell.