The lower-right corner of the frame, that entire forested area there, sort of disintegrates for me. I can't really put my finger on why, but it's somehow simultaneously too flat and too busy. It's like it's just the same too-busy repeated pattern, as if it were a swatch of paisley fabric, perhaps. I can see you've been at some pains to make sure there's a ton of interesting detail in there, but it doesn't work for me.
Possibly a large print would work, by letting my eye see the, uh, trees rather than the forest, if you will.
The fog is lovely, as are the rest of the hills.