Composition - This is my favorite kind of image to critique, not a bad image with loads of potential. This image might have been better served to focus on the hill more as opposed to having it way off to the side. I don't know what the landscape had to offer over there though, so there may be a perfectly good reason why you didn't. The sky is awesome. Great colors and very well exposed. Too bad there weren't a few more trees or anything to add a little texture to your silhouette. Overall I say its a good composition.
Technical - This is where this image falters a little and I think it's all in the focus or lackthereof. This shot really sharp with a little of anything as a silhouette would be awesome. It needs to be sharp though with clearly visible silhouettes or it really loses our attention that the sky initially grabbed. Very good job exposing this properly. Your timing was excellent.
Overall - My feeling about this image is that its pretty good, but really has a world of potential. A couple of people in this pic with it a little closer to make them more distinguishable would be great. Sometimes the people just aren't around though, especially at sunrise. This is a nice shot. Good luck and keep shooting these sunrises. - Inspzil