I have completed the run previously and can endorse what Alan states.
My wife is training for the Rome Marathon in March and I will be pacing her around the this course.We selected this event due to its friendliness and the fact that it is virtually flat.
I think we can achieve the mileage time which Alan has previously stated and if we do not it will not be from lack of trying.We have experimented with the Gallaway "walk-run method" and have found that his advice achieves a better time than attempting to run the whole thing!
Several years ago whilst running the Monchau Marathon in Germany I was approaching the finishing line with a friend of mine.Realizing that I was not in the medals I thought that it would be a first for me to be last - my friend had the same idea ! A scuffle took place just prior to the finishing line which resulted in the bodily picking up of my slightly built fellow runner and throwing him over the finish line.A' first last' you may think - oh no! unbeknown to me a lady had stopped in the shrubs just prior to the finish and thereby trotted in after me thwarting my cunning plan.It has however made a good story.
I concur with the previous correspondent , the late finishers often receive the most plaudits.