Hi Yvonne - if you ran it as a straight race, I would put it in the very difficult category. It's mainly off-road, through woods, with some tough uphill stretches. The fact that there are 7 drink stations (14 on the marathon) with wine, food, etc, and everyone stops to chat and drink at each one, breaks the running up nicely.
Add to that the large majority of runners are in fancy dress creates a carnival atmosphere. I've done it twice now and love it.
Good luck with your imminent delivery - hope all goes well