Nice series, the first and last are the only one's totally under your control, the others you had to make due with what was offered. There's always some little bit that creates hindsight within a capture, I'm sure you have your own concerns about each.
I like the dark, contrasting tones of the first shot, would have preferred either more or less of the rock. I like the speckled grass at the top, but the blown highlights to the right are a bit distracting.
Second and third shot are fine, looks like a bit of cloning occurred in the third.
Fourth shot is interesting, nice composition.