Kelardasht is a large valley in the Elborz Mountains of northern Iran in Chalus county, Mazandaran province. It's 30km south of Abbasabad city (on the Caspian Sea) and west of Marzanabad city (on Chalus Road). There are 20,000 inhabitants and 30 villages. The largest community is the city of Hasankif.
Originally a farming area, in recent years much of its land was sold in small lots to build numerous villas which are occupied by summer visitors trying to escape the heat of Tehran and points further south. Arabs from the Gulf states can also be seen there during the summer months.
Its attractions mainly consist of its natural beauty and cooler climate. But picnicing and mountain climbing in the area surrounding Rud Barak is also popular, as well as in the lush Abbasabad Forest nearby.