cetina has its source in the northwestern slopes of dinara. rising from a spring at milasevo near a small village called cetina, north of vrlika, it flows to the adriatic sea. a large artificial lake begins near vrlika, the peruća lake, which was created by a dam some downstream. cetina then passes into the lower portion of the sinj karst field, through the city of sinj. after that it runs eastward, through the city of trilj and then back westward around the mosor mountain, before flowing into the adriatic in the city of omiš.