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Natalie Coughlin
Lynn Hill
On the list because she has set 16 U.S. records and is the world-record holder in the 100-meter backstroke -- the first woman to break the one-minute barrier. She finished first in the 400-meter freestyle at the 2003 world championships and has demonstrated speed and endurance in multiple strokes.
On the list because she was the first to free climb the Nose on Yosemite's El Capitan, in 1993. In 1994, she climbed the Nose in 23 hours, a speed record that hasn't been broken. And she's still one of the best climbers in the world -- male or female -- at age 43.