The Têt is the largest river in Roussillon (modern Pyrénées-Orientales département).
The Têt has itssource at the foot of the Pic Carlit in the Pyrenees. Source elevation ±2,400 m. Its basin (area 1,550 km²) lies entirely in France. It is 120 km long crossing the Pyrénées-Orientales département from West to East.
It flows into the Gulf of Lyon (the Mediterranean Sea) near to Perpignan, discharging on average 7.5 cubic metres per second.
Towns along the river
Tributaries include the Riberole, Carança, Mantet, Rotja, Cady, Castellane, Lentilla and Boulès