You probably know an ultrarunner, and not just the ones you read about in Born to Run. The sport has grown significantly in recent years as more marathoners ask what’s beyond 26.2 miles. In D.C., ultrarunners hide in plain sight, working for the government, opening donut shops, or practicing law. They infiltrate your road marathons, casually enjoying a bagel while you’re trying to stomach another gel. They’re your colleagues, your neighbors, your friends. And if you’ve been thinking about taking on these more extreme distances and conditions, they’re your best resource for getting into the sport.