Syringa or Serviceberry?

My neighbors are giving me mixed identifications of this tree. It grows all over the land we just bought. Most people seem to think it's a Syringa, but judging by the pictures in the Audubon book it looks more like a serviceberry. I know both are native to this area (Eastern Washington). We just moved here last fall, so we haven't seen any fruit yet.

Definitely serviceberry (Amelanchier). Saskatoons (as they are called here) make my favorite pie.

Definitively Serviceberry.

I was wondering about that cuz it doesn't look like the ones I have. Then I looked at this and learned that there are different species.

http://en.wikipedia.org/wiki/Serviceberry

Now this is blooming. The photo shows one in our yard, but they're all over the woods as well. This looks more like what my book says is a "Mock Orange" or "Lewis' Syringa" Philadelphus lewisii Is that right?

Actually the flower clusters (racemes) look suspiciously like chokecherry (Prunus virginiana).

You're right. Here is a better photo of the blossoms. It looks exactly like the Prunus virginiana photos on Google.