The Haraz River () is a notable river flowing through the Mazandaran Province of northern Iran. It flows northwards, from the Alborz mountain range into the Caspian Sea.Haraz river after flowing along the Haraz Road and Valley for about 100 km it meanders in the midst of Amol, from where it reaches the Caspian Sea. Haraz River begins from Mount Damavand and flows northward and pours into Caspian Sea in the area between the two northern cities of Mahmoudabad and Fereydunkenar. Presently, Haraz River is contaminated as discharges of some industrial pants pour into it.