The Shahrood River originates from southern foot of Alborz and consists of two major branches called the Taleqan and Alamoot River. These two rivers join together in the northwest of the Shirkooh village.
The river flows from east to west and flows by Lavasan and finally in the Manjil Gorge joins the Qezel Ozan River ultimately flowing into the Sefid Rood Dam Lake. The river bank and its valleys in natural surroundings are spectacular landscapes.
This lake lies to the north of Qazvin en route to the reputed castle of Hassan Sabbah in Alamoot. It is one of the most beautiful lakes in Iran and its perspectives and view are fantastic, specially in summer and spring.