The neighbourhood had precise borders measuring roughly a square mile, covering the area between Boulevard René-Lévesque at the southern end; Pine Avenue at the foot of Mount Royal at the northern end; University Street at the eastern end, and Guy Street at the western end. In effect, however, the 'Square Mile' was contained within a far smaller area, between Sherbrooke Street and Pine Avenue, and Guy and University, covering scarcely nine streets on the north-south axis. From east to west: McTavish Street, Peel Street, Stanley Street, Drummond Street, Mountain Street, Ontario Avenue (now Avenue du Musée), Redpath Street, Simpson Street, and Guy Street; and three streets on the east-west axis, from south to north: Sherbrooke St. West, McGregor Street (now Doctor Penfield Avenue) and Pine Avenue.