Hi Josh,
Great shot and I love the colours but (sorry there has to be a but) it seems to me that the line between the sky and the landscape does not look real, and so indicates to me, that this is a replacement sky, or the sky been cut out to a seperate layer and tweaked quite a lot before being pasted back into the image - please do not get me worng, I am not criticising your work per se, but if I can tell you have done this, then so can many others and so here is what I suggest you do to make the blend between different layers that bit more seamless and realistic looking.
When you have the edited sky layer situated behind the edited landscape layer, add a mask to the landscape layer and using a relatively small soft edge brush at somewhere between 2% - 10% or so (you will need to experiment here to find the best setting for that particular image), just gently feather (fade slightly) the landscape's edge until it looks natural and so part of the same image.
If I am right about the sky being a replacement and you do try the technique outlined above, then I would love to see the revised version and hear your thoughts on whether you agree that it looks more realistic.
Photobloke