I don't think that zigzag road is adequately hillful to be enough to make interesting viewing - it's neither particularly steep nor particularly long - it's just a drag. I suppose that it could still be a launching point for an attack, particularly using the tight corners which will have to be negotiated more slowly by the peloton, but that's more about the corners than the hill. Then again it is a nice spot for a picnic, but it is that whether there is a cycle race or not.
Not sure exactly where I would pick to watch the race, but given that we currently live on the course, give or take a hundred yards, I suppose I ought to give it some thought.