Sour Cherries

I don't know about New England (where I live), but I know that you can find them in Michigan. There are extensive cherry orchards up around Traverse City. I have my own trees now, but I used to buy them from a Michigan company called Friske.

There was a place right at the rip van winkle bridge that had Tubs of them. I think called cherry ridge farm.

Thank you both. A friend wants to make a sour cherrie pie for Thanksgiving using fresh/frozen cherries. I will pass on your suggestions!

They are not too hard to find canned, in my experience. It might not be worth the trouble to search further, if it's a pie or sauce.
What do you have in mind?

Trader joes has frozen cherries but I'm not sure if they are sour