I did the century last year with a couple of my friends. It was my first century and I was a little worried about the hills, but I found it to be a surprisingly easy ride and not overly hilly. As I recall there was a short steep hill early in the ride when you come out of a park in Clayton and then there were good size hills after 80 miles when you are riding at the convergence of the rivers before taking the second ferry ride. I believe there is an elevation map on Map My Ride that you might look at to get a better idea. It was a beautiful day and we had a great time. I would highly recommend it and hope to go back some time.