The Tarn is a 380.2-kilometre (236.2 mi) long river in the administrative region of Occitania in southern France. It is a right tributary of the Garonne.

The Canal de Garonne, formerly known as Canal latéral à la Garonne, is a French canal dating from the mid-19th century that connects Toulouse to Castets-en-Dorthe. The remainder of the route to Bordeaux uses the river Garonne. It is the continuation of the Canal du Midi which connects the Mediterranean with Toulouse.