Route 335 begins in Montreal at Sherbrooke Street (Route 138) and follows Saint Denis Street. North of the Autoroute 40, Route 335 splits to a one-way pair, following Berri Street southbound and Lajeunesse Street northbound, and then crosses the Viau Bridge over Rivière des Prairies to Laval. It follows Laurentian Boulevard to Autoroute 440 on Laurentian Boulevard.
Route 335 starts in Montreal at Sherbrooke Street (Route 138) and travels along Saint Denis Street. North of the Autoroute 40, Route 335 splits into a one-way pair, heading southbound on Berri Street and northbound on Lajeunesse Street before crossing the Viau Bridge over Rivière des Prairies to Laval. It then continues on Laurentian Boulevard until it reaches Autoroute 440 on Laurentian Boulevard.