They may be naturalized sweet cherry Prunus avium. At my house growing up in NJ, there were lots of wild cherry trees with good sized fruit (smaller than commercial, but way bigger than choke or pin cherries). Some were a little sour, some were sweet, all were good. I had spent a lot of time trying to ID them from a field guide that only includes native species, but it never quite fit. I eventually realized that they are P avium escaped from cultivation.
If you look at the map linked below, you can see that they are widely naturalized east of the Mississippi.
https://plants.usda.gov/core/profile?symbol=PRAV
***Note - just because a state or county is blank doesn’t mean it’s definitely not there, just that the folks who maintain this database couldn’t find a reliable source demonstrating its presence.
@AndySmith, I see pin cherries fruit reliably here in New Hampshire, but they seem to get eaten by birds within a few days of ripening.