I was just basing that on the official site description ! I ran 2 Marathons in Southampton back in the 80's, I suspect they are no longer held? The race started and finished on the Common with 2 x 13 mile circuits taking in, from memory, Lordshill, Shirley, City Centre, Portswood and a few points in between ! It was a decent course with the only real hill being as you headed into Shirley from Winchester Road.