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.
Towns along the river
Tributaries include the Riberole, Carança, Mantet, Rotja, Cady, Castellane, Lentilla and Boulès