Date: 1978-88
Set By: Grete Waitz

Running a marathon is hard. Running it fast is even harder. Winning a world-famous marathon where the top competitors from all across the world train for months on end for this one race? Almost impossible. So if anyone thinks they can take down a staggering nine of these, good luck to you. What is really amazing about Grete Waitz's achievement is that she won her nine in 11 years. You have to wonder, though, with skills like that, what the hell happened in those two years she didn't win?