Comics available - https://www.halloweencomicfest.com/Catalog
Store Locator - https://www.halloweencomicfest.com/StoreLocator
This is pretty similar to Free Comic Book Day, but probably not as well known. We usually get a pretty nice collection of free comics each year. Some stores have limits per person or family. Although this is a freebie and you are not really required to purchase anything, I would still recommend buying a few things to support your local comic book store. Many times they'll have sales or events going on for this as well. Bring the kids in costume.