No, the size of a cherry...looks just like cherries

And a few more pics. One of the bottom of the fruit, and one cut open to see if it has a stone or individual seeds please.

It is an ornamental plum. They are very widely planted but often do not produce fruit, or the fruit is easily overlooked... Edible of course, but only good when soft ripe, at least for fresh eating. Otherwise very tart and astringent. I've never seen them in that quantity, but if I did I would probably find a use for them!

Apparently it is Prunus cerasifera, one of the purple leaved varieties like thundercloud. They are all over here in NM too...

I imagine nmfruit is spot on. It's definitely a stone fruit. With the amount of fruit you had, I thought it might be a crab apple, even with the purple leaves. The stone shows it isn't. Do animals eat the fruit? And have you tasted it now and what did you think if so?

Usually if something is edible, birds are pecking at it.

As a kid, I climbed dozens of these trees and ate every fruit I could get my hands on. They are best left on the tree until they soften, but I usually couldn't wait.

They are definitely edible but not necessarily palatable raw unless very ripe. They are fine if you cook them - jam, jelly, pies, stewed fruit or any other recipe which would normally use plums.

Thank you...im making some jam today!

Nice find...lots grown along boulevards where I think you found it?