National S'mores Day (10 August)
S'mores Day has come around again and this blog is still going - at 50ish shops a year, I won't hit full coverage until 2034 anyway, and that's not accounting for churn (haha).
Previous years:
Uncle John's Ice Creamery

Uncle John's Ice Creamery opened in 2025 and has a "Fire Pit S'mores" flavor - a toasted marshmallow base with mini marshmallows, chocolate chips, and graham cracker pieces. (If the "toasted" marshmallow flavor is convincing enough, we will forgive them not involving Actual Fire, at least this year...)
Heritage Farms

Heritage Farms has a "Campfire S'mores" flavor on their menu year-round! Graham cracker pieces and a caramel swirl mixed in with a lot of other flavors - kind of sweet, but it gets everything except the fire part. (It's a Richardson's flavor, which is documented as "Toasted marshmallow ice cream with chocolate chips, marshmallows, and a graham cracker twirl" so maybe it will turn up at other places too.
Meola's Wayside Ice Cream

Meola's Wayside Ice Cream has a permanent-menu (painted sign) "Smores" ice cream with a toasted marshmallow base, graham cracker swirl, mini marshmallows, and chocolate chips. They also have a "Campfire Smores Sundae" if you want to pick your choice of ice cream, they add mini Hershey bars, graham crackers, mini marshmallows, hot fudge and whipped cream.
Uhlman's Farm Ice Cream

Uhlman's Farm Ice Cream has a permanent "S'Mores Sundae" on their Specialties menu, with graham crackers, hot fudge, marshmallow, whipped cream and a cherry (on your ice cream of choice.) They also have "Campfire S'mores" and "Graham Central" ice cream.
Dribbles

Dribbles has a S'Mores Sundae on their Specialty Sundaes menu, with Vanilla Ice Cream, hot fudge, marshmallow sauce, crushed cone, whipped cream, and a cherry. No mention of fire and no other graham cracker related options on their menu.
Kimball Farm (Lancaster)

Kimball Farm Lancaster has a S'mores ice cream on their specials menu, though no other related flavors (and I didn't see an explicit toppings list.)
Wagon Creamery

Wagon Creamery has a Campfire S'more flavor on both their 2025 and 2026 menus. They also have both Graham Cracker and Marshmallow toppings, though fire doesn't appear to be on the menu.
Products (that didn't really work out)
Found a couple of S'mores-ish products in grocery stores where you might be picking up actual S'mores ingredients - while they're interesting in their own right, none of them actually come across as "S'mores" themselves at all.
La Colombe Limited Edition S'mores "Draft Latte"
Not exactly ice cream but a latte drink is most of the way there: La Colombe has a Limited Edition S'mores "Draft Latte" (espresso roast with whole milk.) Sold in skinny 11oz cans, found at Wegman's. Basically a milk drink lightly flavored with coffee but with a lot of extra sweetness; a hint of chocolate (less than I expected given Dutch Cocoa in the ingredients list - more towards the end, I guess it settles out and you should pour it or swirl it, but it says "do not shake" on the can) and nothing that even hints at graham or marshmallow.
Ben & Jerry's
Ben & Jerry's Gimme S'more! pints are back in Wegman's. The ingredients include Cocoa and Graham Flour, also Molasses and Honey; it doesn't list Gelatin and some reviews complain of it not having a Marshmallow flavor.
In practice, it comes across as a pretty good "cookies and creme" flavor - a lot of texture (ribbon of fudge, chocolate chunks) but not "crunchy" like Americone Dream. Didn't notice any graham or molasses flavor, though it was more than just sweet. It's certainly one of the nicer Ben & Jerry's flavors, but it doesn't really evoke "S'mores" at all.