Here's a hint.
That's a total of 70.5 miles.
24-year-old Rendy Lynn Opdycke did it in 27 hours, across 36 days, a record for the shortest duration to complete the three classic marathon swims.
As to the why, Opdycke said, “I guess it's like the saying, 'If not now, when?' I just graduated from grad school, why not do something in the meantime instead of twiddling your thumbs and sitting on your bum?”
According to SignonSanDiego.com:
"To accomplish her feat, Opdycke overcame a New York jellyfish attack, 20 mph winds with frightening whitecaps in the English Channel and an emotional battle relating to a family tragedy.
Opdycke joins a rich tradition of San Diego marathon swimmers, dating back to 1950 when Point Loma High graduate Florence Chadwick broke the world record for fastest English Channel crossing. The next year Chadwick became the first woman to cross the channel in both directions."
You can read the rest of the story HERE.