Its course crosses the Nord department, notably the eastern part of the agglomeration of Lille. It flows northwards through the towns of Pont-à-Marcq, Tressin, Villeneuve d'Ascq, Croix and Marcq-en-Barœul, finally flowing into the Deûle in Marquette-lez-Lille. Its lowermost section, between Wasquehal and Marquette-lez-Lille, is part of the Canal de Roubaix.
Its path traverses the Nord department, particularly the eastern portion of the Lille metropolitan area. It flows northwards through the towns of Pont-à-Marcq, Tressin, Villeneuve d'Ascq, Croix, and Marcq-en-Barœul, ultimately emptying into the Deûle in Marquette-lez-Lille. The lowest section, between Wasquehal and Marquette-lez-Lille, is part of the Canal de Roubaix.