I think it's not photoshop. Most of those tree's aren't pine trees either in the southern sense. Evergreens yes, but not pines. I think it's a road as well as it exhibit's tire wear paths. The largest recorded kill stood 92" at the shoulder or 7'6". It's not unusual for the ones in the yukon to get to 7'. That road looks more like a fire trail to me as well. They are typically between 6 and 7 feet wide. if you took that wash out beam you see in picture number 2 just under it's hoof, they are normally 8' in length. turn that vertical and it exceeds the heigth of the moose, which again lends credibility to the picture. I'd say it's just under 7' at the shoulder, and given that, the trees in the back ground are probably in high country as well. which in areas north, (canadian yukon) would not be unusual to be stunted.
I may be proven wrong, but I think it's real.
I'm not thinkin it's photoshop. The only times I saw any moose was when I was workin in Salt Lake and their bellies came up to the hood on my truck and they was on the young side, the bull anyways. When I first saw them I thought they was just big horses on free range but found out different when I got drove by them an they were lookin down at me. They are a really huge animal up close an dangerous to boot if you piss em off!