Nice shot. You captured it very well with very little graininess. I think I would have elevated my framing of this shot just a bit to exclude some of the really dark scenery at the bottom. Just seems to take away from that fine sky you have there.
I have to agree with bfrank, My first reaction, after admiring the pretty pastel sky, was to imagine reframing/cropping this shot. Cropping can work wonders and I now crop many shots even after I think I have captured a fine composition. Other than that, I can imagine how peaceful it must have been at this location at this moment.
Herman