Vague à Guy - Lasalle (Montréal)

Vague à Guy (Lasalle) is a permanent standing river wave located at Parc des Rapides in LaSalle on the Saint Lawrence River (Lachine Rapids). Because the wave holds position like a “standing” feature rather than a traveling ocean break, it’s commonly described as very consistent and suitable for focused practice sessions. Access is described as straightforward from the park area, with walk-in access from public paths and improvements to entry/exit using stairs and docks. The setup is compact (small launch area) and the bottom is rocky, with boulders and slippery rocks reported near the entry, making foot protection and careful movement important. Conditions are strongly governed by river flow: higher flow increases wave steepness/power, while very low flow can flatten the wave. While one description characterizes rides as short (often under 50 m), the standing nature also means continuous riding is possible for as long as balance/energy holds. Wave quality is consistently reported as good to moderate, and the wave is described as working across the full tide cycle. Safety-wise, the key risk is the combination of strong currents and rocky hazards, including downstream rapids if you drift too far. Sources also note that the site is restricted to nautical activities between May 1 and October 15, so plan sessions within that window and follow local river surfing etiquette (including limiting to one person on the wave at a time).