I walked the full one when I was 16, and that was hard enough I think it took us about 15 hours, started at about half 5, finished somewhere around 8 half 8. It was a baking hot day and me and my mum ended up with sun stroke. If I could do that then why am I so unfit now
Seriously though, it's just long, there isn't a huge amount of climbing in it for the distance.
I quite fancied running the half way this year, I think I'm another 18 months off being able to do the full route.
Also two crosses entries are out, not done it before but the Mrs did it last year and says it's a goody!