This is a walk tour that even locals do.
It is a kind of rectangle that will need half a day to complete.
You can do in multiple straight.
Basically, you walk two East-West Major Artery: Sherbrooke and Ste-Catherine St.
You can explore many of the major streets that runs between these two.
Ste-Catherine St. is one of the longest commercial street in North America.
Like many walking tours of a city you can just stroll to your own pace and just
let the city unfold in front of you or
get a guide (book) to discover all there is to see and discover..
In fact you could spend easily 3 days within that ¨super blocks ¨ if you want to really visit Montreal.