The north–south streets of Parc Extension have the same names as those in line with them in Outremont, south of the railway tracks, from Hutchison Street in the east to Birnam in the west. McEachran Street was renamed L'Acadie Boulevard when the street was widened in the late 1950s. The area covered by the residences in the Town of Mount Royal from L'Acadie in the east to Rockland in the west and between Lockhart in the south to Cremazie in the north was once a 9-hole golf course. The golf course was sub-divided during the 1950s and the fence was erected after all the houses covered the golf course land.