The Luni is a river of western Rajasthan state, India. It originates in the Pushkar valley of the Aravalli Range, near Ajmer and end in the Rann of Kutch (Gujarat).
It is also known as Lavanavari river. It means "Salt River" in Sanskrit.
Rising in the western Aravalli Range in the state of Rajasthan, where it is known as the Sagarmati, it flows south-west and enters a patch of desert before dissipating into the Rann of Kutch, traversing a total of 530 km. In spite of the high salinity, it is a major river in the region and serves as a primary source of irrigation.
It may well have been the southern portion of the Ghaggar-Hakra.