When Hulda Crooks stood on the summit of Mount Fuji on July 24, 1987, she was 91 years old and had already spent decades proving that age had little say in what the human body could achieve. The climb made her the oldest woman to reach Japan’s highest peak, adding another milestone to a life that had already earned her the nickname “Grandma Whitney.” Long before that ascent, Crooks had developed an extraordinary habit of climbing Mount Whitney, the tallest peak in the contiguous United States, returning to its summit 23 times between the ages of 66 and 91.

When Hulda Crooks stood on the summit of Mount Fuji on July 24, 1987, she was 91 years old and had already spent decades proving that age had little say in what the human body…

Hulda Crooks, a Canadian-born American mountaineer, achieved extraordinary climbing feats in her nineties. Crooks climbed Mount Whitney 23 times, earning the nickname "Grandma…