The largest and the most beautiful lakes in the region, which is located within 75km northeast of Qazvin. it's length in longest part is 325 meters and it's width is 275 meters and it's depth is 1 to 5/7 meters. it's water is supplied from springs and rainfall and it's boiling state causing permanent filter and clean water. a small river is formed because of the overflow water from of the lake, it's water May be used by farmers of "Kushak" and "Ayin" village. In summer the lake is the place of fishing, sailing and swimming and in fall a safe place for migratory birds such as swan, goose, duck, and in the winter due to the freezing and cool weather , it's surface is suitable for ski.