The Jarahi River flows through the townships of Kohkiluyeh Va Boyer Ahmad, Behbahan, Ramhormoz and Mah Shahr. It originates from the mountains of Rah Barik, Sefid and Golgilak, 53 km. northwest of Yasooj. After following a long course, and joining to various rivers, under the name of Maroon, enters the township of Behbahan and then Agajari village.
This river after crossing south of the Ramhormoz township and Ramsheer city, with the name of the Jarahi River, enters the township of Mah Shahr and finally flows into the Persian Gulf.