Ovan lake (also known as Evan lake) is a small alpine lake in Alamut region of Arburz range, in Qazvin province of Iran. The centre point of the lake is approximately located at 36°28′58.98″N 50°26′37.39″E. The only tributary that flows into the lake, is a stream with the same name, Ovan, coming down from northern mounts. The north of the lake is also surrounded by three small villages, namely from east to west: Varbon, Ovan and Zar-abaad.