How the First Woman to Run the Boston Marathon Is Still Running Marathons at 70

When Kathrine Switzer crossed the finish line of the Boston Marathon in 1967, it was remarkable because she was a woman — the first to run the race as an official entrant. When she crossed the same finish line 50 years later, it was remarkable because she was 70.

Switzer, who built a career on challenging gender stereotypes in sports, said she is now focused on tackling "the frontier of aging.