Thanks everyone! It was a fun shot because I had to wait on the sun to rise...I though the sun would be rising at the end of the tracks, but it was off to the left..the fog was just a bonus :)
What mpeters said - the combination of the shape around the vanishing point and the gap in the trees towards the top of the frame looks like an ethereal steam train on the tracks which only enhances the otherworldly feeling created by the colouring.
love the framing, and especially how the trees seem to wrap up the track at the back. Great picture and the post processing is the definitely right for the mood.