Even though the colors and landscape are beautiful, I don't like the subject's pose. I'm not sure how I'd improve it, but this way it looks to me like she's forgot something and remembered it in this very moment. I also think the vignette is not necessary here and that you could crop the top of the photo (in 3:2), so the line of the horizon is in the middle (because the subject's head will be on a third). Post processing is not too demanding in shots like these as the colors are already beautiful. So, for me - good choice of time to shoot, good choice of landscape, good choice of subject, but could use a better composition, subject's pose and post processing.