I'm assuming you must've used a high ASA/ISO? Grain usually looks amateurish but for some reason it lays this photo out nicely. Perhaps the vintage feel aligns with the content of the photo er something..
Anyhow, I really like this..perfect for black and white because of the black, grey, white, grey black (from bottom up)
The grainy sky doesn't bother me, the bottom half though is too dark especially the trees, gotta show a bit more detail in those shadow areas if possible.