Looks like a serviceberry to me. Check out http://www.bhg.com/gardening/plant-dictionary/tree/serviceberry/.
I check it out Mary Anderson and maybe be the Cumulus Allegheny. My grand daughter brought it to us 3 years ago the school gave it to her and said it was a dogwood but after the 1st year we know it wasn't... thank you
Appears to be a wild plum.
I agree with Mary. It does look like serviceberry. I have a friend that has several and they look the same.
Are the berries white? I don't think the leaf is right for a serviceberry. It looks like a Gray's dogwood to me (Cornus racemosa). If the bark turns red in the winter it is likely Cornus sericea.
to my knowledge, service berry tree flowers have 5 petals, not 4 right? I think Doug hit it on the head with the "Gray's dogwood", looks like the exact 4 petal flower with large stamens. Also, the drooping leaves are an indication of Gray's dogwood and many other dog woods trees.
I have a wild dogwood that grows in the forest that look exactly like this.
Doug Hunt...The berries turn red..... and the trunk bark looks like a dogwood but the young bark is redish. Thanks everyone for the answers
red twig dogwood...definitely Cornus------
Looks like Elderberry.
Looks an awful lot like Seven Son Flower - Heptacodium.