My comments will be for composition - I'm still learning too much about editing. Although I can say it'll be easier for others to help out if they know what editing you have done so far.
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I'd have liked to see more of the ground/mountains in the first - not just a little slither.
For the 2nd, as has been said it looks a little crooked, but that could be how the land lays also..it's hard to tell. Something else to watch out for is to try not to put the horizon dead-center in the frame. Move it up or down, depending on the type of shot you're going for, and it will make it a bit more interesting.
Now after having looked at the first two more closely, I've noticed they're basically the same shot framed differently. Put the horizon about halfway in between the two shots, and (in my opinion) it'll be spot-on.
For the last photo, no offense, but it looks like you were standing there and just snapped a shot. To make it more interesting, try getting lower to the ground and maybe frame it vertically to get more of the creek (I guess?) rather than such a small portion of it. Also, maybe try to frame it so that it sort of runs into the photo rather than right through it, again just so that it's not dead-center.
All that being said, I like the first two shots a lot - it looks like a nice, quiet place.
