well for me at least it was an epic but since my endurance training consisted of 145m along a canal perhaps my legs were taken by surprise.
It was probably the hardest 'run' i've ever done & definitely the prettiest. the ascents are so long and the descents generally so steep that there isn't much opportunity for extended running.
Despite strong advice to the contrary I think I still probably set off too fast and by 25m was being sick. By les Chapieux I was very demoralised (and still being sick) but took some time to revaluate my expectations and decided a finish was a must (even if only just inside the deadlines) just so I didn't have to come back again.
As a result I took things easier through the day, joined up with a couple of other Brits, whose company helped tremendously, and just slogged it out. by the 2nd evening I was a lot better and by the last day was actually feeling quite good. the finish was brilliant and I even downed a can of beer without being sick - which is unusual for me at the end of an ultra.
At least I now don't have to go back but the pain in my brain already seems to be fading faster than the pain in my legs!