Nice candid looking shot and the location is very dramatic. The use of depth of field here is very nice. The white balance seems to be a little off though as she has a green color cast. Also a little extra work in post to smooth out her skin tones and put some life into her eyes would make a huge difference.
Editing color from a websize image is never the best option but this edit will give you an idea of how I think it could look better. Of course better is always a subjective situation but I have cleaned up the color cast, added some color to her skin, catchlights in her eyes, smoothed skintones to remove blotchyness and done a little dodging and burning here and there