Very expansive and beautiful scene. As a personal opinion, I think the blue tone is too heavy. I think I might have cropped in more on a tighter shot of the crosses and straightened the horizon. For some reason, the mountains and clouds appear a bit over-sharpened, yet the foreground is softer.
I wish that you had either brned and dodged the sky a bit more or boosted the hue/sat and contrast....it would have made a stronger impact in the picture as a whole. Nice work though.
I am making two passes on this Challenge. I will vote on your photo then return later(before voting is over) to comment on what I like and dislike about your shot. You can take the comments however you wish and I will try not to be mean. Just don't take it the wrong way.
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The horizon is unlevel. Fix that and it is almost perfect. I love the sky and the mountains in the background.