Roubaix is a city in the Nord department, in the Hauts-de-France region, in north France. About 94,000 live there at about 7,119 people per square kilometer. It is near the cities Lille and Tourcoing. There is a metro and tram line between Roubaix and these places. Roubaix is near the Belgian border. The city is well known for its cycling race Paris-Roubaix which is over 259.5 km and includes almost 50 km of cobblestone sections.