The Afrin River is a tributary of the Orontes River

Orontes River

The Orontes or ‘Āṣī is a river of Lebanon, Syria and Turkey.It was anciently the chief river of the Levant, also called Draco, Typhon and Axius...

 in Turkey

Turkey

Turkey , known officially as the Republic of Turkey , is a Eurasian country located in Western Asia and in East Thrace in Southeastern Europe...

 and Syria

Syria

Syria , officially the Syrian Arab Republic , is a country in Western Asia, bordering Lebanon and the Mediterranean Sea to the West, Turkey to the north, Iraq to the east, Jordan to the south, and Israel to the southwest....

. It rises in the Kartal Mountains in Gaziantep Province

Gaziantep Province

Gaziantep Province is a province in south-central Turkey. Its capital is the city of Gaziantep which had a population of 853,513 as of 2000. Its neighbours are Adıyaman at north, Şanlıurfa at east, Syria and Kilis at south, Hatay at southwest, Osmaniye at west and Kahramanmaraş at northwest.An...

, Turkey, flows south through the city of Afrin

Afrin, Syria

Afrin is both a district and city of the Aleppo Governorate, Syria. The district includes the city of 80,000 inhabitants and 366 surrounding villages and farms. The region of Afrin with its 490,000 inhabitants is next to Kurd-Dagh . The district has a surface of 2.033 km square and e.g...

 in Syria, then reenters Turkey. It joins the Karasu

Karasu (Hatay)

The Karasu or Aswad is a river in the provinces of Gaziantep and Hatay in Turkey. For part of its length it forms the border with Aleppo Governorate in Syria. It joins the Afrin River at the site of the former Lake Amik, and its waters now flow to the Orontes by a canal....

 at the site of the former Lake Amik

Lake Amik

Lake Amik or the Lake of Antioch was a large freshwater lake in the basin of the Orontes River in Hatay Province, Turkey; it was located north-east of the ancient city of Antioch...

, and its waters now flow to the Orontes by a canal. The total length of the river is 139 km, of which 55 km is in Syria.