Not Alone

 This morning I read an article in the local paper about an ultra runner that dnfed the Ozark Trail 100 mile.  The Ozark Trail is one of the toughest trail ultras in the mid-west, maybe the country.  How difficult is it to train for a run like that?   I have completed two 30 mile trail runs but both times I was training for marathons so the jump from 26.2 to 32 and  33 miles was not much of a leap.  Lots to learn.