Maybe a black cherry tree?
Is this C. pungens? I have never seen it on the watershed before, but this year it’s cropped up in a couple of places.
Listed as the host for these galls:
https://www.inaturalist.org/observations/237203079
https://www.inaturalist.org/observations/237203082
https://www.inaturalist.org/observations/237203084
Are these young Red Cone Galls, or different?
Edgewood Park and Natural Preserve, Clarkia Trail