Ultrarunning

Last year, Ms. Merino became one of just over 300 people to complete the Grand Slam of ultrarunning.

Tragedy is hardly a foreign concept in ultrarunning, races longer than the standard marathon distance of 26.2 miles. But the scale of the loss of life in Gansu Province was hard for even veterans of the growing sport to fathom. […] “I am so freaked out,” Katie Arnold, an ultrarunning champion and the author of the memoir, “Running Home,” said Monday. “I can’t even get my mind around it.”