To the surprise of many in the ultrarunning world, these ridiculously long races are growing in popularity. In 2014, the ultrarunner Candice Burt created the Tahoe 200, the race in which Dauwalter saw the puppets on the swing set. It was the first 200-mile-plus single-loop ultramarathon in the United States. Ninety-one people signed up. The next year, she started the Bigfoot 200, a 206-mile race that traverses the Cascade Mountains in Washington State. In 2017, she added the Moab 240, the race in which Dauwalter obliterated the competition. This year, more than 600 people ran one of the three ultraraces Burt organized.