Lisa Smith-Batchen, the amazingly sunny and pixie-tailed ultrarunner from Idaho who trained through blizzards to win a six-day race in the Sahara, talks about exhaustion as if it’s a playful pet. “I love the Beast,” she says. “I actually look forward to the Beast showing up, because every time he does, I handle him better. I get him more under control.” Once the Beast arrives, Lisa knows what she has to deal with and can get down to work.