How was that possible? No woman ranked among the top fifty in the world in the mile (the female world record for the mile, 4:12, was achieved a century ago by men and rather routinely now by high school boys). A woman might sneak into the top twenty in a marathon (in 2003, Paula Radcliffe’s world-best 2:15:25 was just ten minutes off Paul Tergat’s 2:04:55 men’s record). But in ultras, women were taking home the hardware. Why, Vigil wondered, did the gap between male and female champions get smaller as the race got longer— shouldn’t it be the other way around?