Today Fairmount Bagel is widely regarded as having the best Montreal style bagels in the city, which is fitting since they invented the breed back in 1919. With nearly a hundred reviews already it's clear the place is special and there's little I can add to the conversation.
Try the bagels and then hit Schwartz's Deli on your walk back downtown. It's pretty much required of every visitor to Montreal.
For those living in Montreal I thought I'd highlight the fact that Fairmount Bagel also makes incredible European style soft pretzels. Seriously you won't find a better soft pretzel anywhere in the city. They usually sell the last of them by late afternoon so go early or risk having your hopes dashed.