In reply to climbercool:
> I'm interested to know what sort of time these guys run over shorter distances, i guess they are also insanely fast over half and marathon distance? or is it a really specialist thing and their real talent is being able to navigate and endure tough conditions? What would happen if you tried to train one of those elite sub 2:15 marathon runners to have a go at this, where would they struggle, the distance, the terrain?
DMC does marathons in 3.15-3.33ish, and halfs in 1.35ish, so decent, but not spectacular. I've beaten her in a 10-mile road race, but I couldn't imagine taking on the ultras she does. I think a bit part of her running must be her ability to accept long periods of pain and exhaustion - that takes a special kind of person.