Here's the Australian edition of Kent Haruf's Eventide, from Pan Macmillan Australia, which I saw while browsing through their online catalog. I know I've seen this cover image before, on some book (maybe historical, maybe not) from an American publisher. Unfortunately, I can't quite place it yet. The US edition of Haruf's novel looks nothing like it, so that's not it.
Update: here it is, on the cover of the paperback edition of Lorna Landvik's Oh My Stars, which is, in fact, historical.
I don't know why, but I have a pretty good memory for this sort of thing.