The grueling 135-mile journey of a 66-year-old runner through one of the hottest places on Earth

DEATH VALLEY NATIONAL PARK, Calif. (AP) — When the running gets hard in this desert dubbed “hell on Earth,” Danny Westergaard tells himself: “Slow and steady” or “smooth as butter.”

For 18 years, Westergaard, 66, has braved the scorching summer heat of California’s Death Valley in an ultramarathon billed as the world’s toughest. Last week, 99 runners from across the globe embarked on a grueling 135 mile (217.26 kilometer) competition from the lowest point below sea level of North America...