First one is nice. bring the foreground rock up a bit. The reflection on the lake does not appear to match the sky coloring.
Second shot is dark and the sky is imposing. It would have been nice to get in closer to the person in the boat and make that the main subject.
The images are not in focus. I assume you used a tripod. Set the Nikon for a 2 sec. delayed mirror up mode for long exposures.