Dating all the way back to 1897, the Boston Marathon is the world's oldest annual marathon, and among its most prestigious. While today, women make up nearly half of its finishers, the race wasn't always that way. The historic event didn't allow women to enter until the surprisingly tardy year of 1971. Even so, two women went down in history when they each broke the rules and ran the Boston Marathon anyway.
And Then There Were Two
Kathrine Switzer: First Woman to Enter the Boston Marathon
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