Courtney Dauwalter won the 2017 Run Rabbit Run, a 100-mile ultramarathon, despite going temporarily blind during the final 12 miles. A few months later, she won the Moab 240, a 238 mile race with more than 29,400 feet of cumulative climb (Mount Everest’s peak, by comparison, is 29,032 feet) with a winning time of 57 hours and 55 minutes—a course record and 10 hours faster than the first male finisher. Dauwalter also holds the record for