Tigris
Overview
 
The Tigris River (ˈtaɪɡrɪs) is the eastern member of the two great rivers that define Mesopotamia
Mesopotamia
Mesopotamia is a toponym for the area of the Tigris–Euphrates river system, largely corresponding to modern-day Iraq, northeastern Syria, southeastern Turkey and southwestern Iran.Widely considered to be the cradle of civilization, Bronze Age Mesopotamia included Sumer and the...

, the other being the Euphrates
Euphrates
The Euphrates is the longest and one of the most historically important rivers of Western Asia. Together with the Tigris, it is one of the two defining rivers of Mesopotamia...

. The river flows south from the mountains of southeastern 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...

 through Iraq
Iraq
Iraq ; officially the Republic of Iraq is a country in Western Asia spanning most of the northwestern end of the Zagros mountain range, the eastern part of the Syrian Desert and the northern part of the Arabian Desert....

.
The Tigris is about 1,850 km long, rising in the Taurus Mountains
Taurus Mountains
Taurus Mountains are a mountain complex in southern Turkey, dividing the Mediterranean coastal region of southern Turkey from the central Anatolian Plateau. The system extends along a curve from Lake Eğirdir in the west to the upper reaches of the Euphrates and Tigris rivers in the east...

 of eastern Turkey about 25 km southeast of the city of Elazig
Elazig
Elâzığ is a city in Eastern Anatolia, Turkey and the seat of Elâzığ Province. It has a population of331,479 according to the 2010 census, and the plain on which the city extends has an altitude of 1067 metres....

 and circa 30 km from the headwaters of the Euphrates
Euphrates
The Euphrates is the longest and one of the most historically important rivers of Western Asia. Together with the Tigris, it is one of the two defining rivers of Mesopotamia...

 River. The river then flows for 400 km through Turkish territory, before becoming the border between Syria and Iraq.
 
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