Lar National Park (Persian پارک ملی لار park-e melli-e lar) is a protected area in Mazandaran Province and Tehran Province, in northern Iran.
The 30,000-hectare (74,000-acre) park is in the Central Alborz mountain range, at the foot of Mount Damavand.
It has been a national park since 1976 and a protected area since 1982 by the Iran Department of Environment. Since 1991 hunting has been prohibited.
The Lar Dam and reservoir is located within the park. It is a major tourist attraction, being only 70 kilometres (43 mi) northeast of Tehran.
The park is accessible by car via Haraz road (Road 77).
One of the rare species of the Salmonidae family of fish is native to this area. Other notable flora and fauna of the park are:
Coordinates: 35°59′06″N 51°58′45″E / 35.9851°N 51.9791°E