“The medals will come later.” Sifan Hassan is about to run 41 miles in nine days. The Dutch star is already among the all-time distance running greats, but what she might do next is simply next-level.

Drury said she has only competed in local mixed-gender ekiden long-distance relay races. “I felt so good to run on such a big stage,” she said with a smile. “I love running, so I want to ...