A classic location, indeed, but it certainly paid to get on the road before there was even a hint of light in the sky. The layer of clouds between the far bend in the river and the mountains much farther away helps create another layer of depth. And a stronger than normal earth shadow effect (why does it vary as much as it does, I wonder?) worked well here too.
This is an extremely well-visited location, by true sunrise it would have been difficult to take this picture without including a photographer, and in fact I have a few, but in any case, this soft predawn light was more pleasing in any case.