IMBA has listed the 100 km course form the Paul's Dirty Enduro as a Epic ride. I myself have never finished this event. That being said we have been hitting up the different distances over the past few rides.
The other great thing about the Ganny is the fact the 3 course distances ( 100, 60 & 30 km ) are now permanently signed so you don't really need the Garmin for route finding anymore. Still think you could never ride everything this place has in one summer ( after all the 100 km course is 1 lap ).