Lee Craigie has just scratched out of the Tour Divide, a 2,745-mile mountain bike race that starts in Canada and finishes at the Mexican border. It requires covering around 20 hours and 140 miles a day with everything you need to eat or sleep strapped to the bike. But one week into that challenge, Lee’s body began to swell up. “I noticed I was getting shorter and shorter of breath but I was like, ‘Come on, Lee. You’re just tired, push through it.’”
By the time she reached Wyoming, however, her lips were turning blue, her face grey. It was an inexplicable allergic reaction. Determined not to let a year of preparation go to waste, she hitched a ride to the nearest hospital, took a rigorous two-day course of steroids,…