Boston Beer has added a “beer finder” to its Samuel Adams website.
The bad news is that this link won’t get you all the way. You’ll have to stop and show an ID to get in.
The good news is that it works. Type in a ZIP codes and you get a list of places that sell Sam Adams beers. You can even specify a particular brand.
(And here’s a secret: Lots of stores, bars and restaurants that sell Sam Adams also sell other beer you might want to drink.)