The Battle of Lake Kastoria (Greek: Μάχη λίμνης Καστοριάς) consisted of two parallel engagements north and south of Lake Kastoria (individually known in Greek as the battles of Argos Orestiko and of Foteini Pass) between Greek and German forces on 15 April 1941. Following the Greek failure to hold the Pass of Kleisoura on 14 April a new attempt was made to stop the German advance east of the road Bilisht (in Albania) – Kastoria – Grevena, which was used as the main route for the withdrawal of the Greek Western Macedonia Army Section.