Oh wow, this is quite an impressive landscape! I like the perspective you Chose and that there's some Kind of path in the middle of all those trees. From my Point of view the contrast is a litte bit too much, the green and the pink just look unreal. Of course the colours are amazing, but they're too intensive.
Yes I did add some additional saturation as well as many other things, usually I spend a fair amount of time in Photoshop making my pictures look just right. I find half the battle is after taking the actual picture. But there are times when I post stuff right from the camera nothing changed as well, it just depends on the look I am going for.