The BougeBouge 5KM Montreal Underground is the only race held entirely within Montreal’s underground pedestrian network.The event turns the city’s extensive “RÉSO” into a marked running course, offering participants a rare chance to cover five kilometers through a space normally used only for transit and shopping. The course links together commercial centers, metro stations, and office towers in a continuous route that highlights the scale of this hidden infrastructure. Designed to encourage participation from all levels, the event combines a straightforward physical challenge with a perspective on how thousands of people move through the city every day.