Carolynn Marie Hill (born January 3, 1961) is an American rock climber. Widely regarded as one of the leading competition climbers, traditional climbers (and particularly big wall climbers), sport climbers, and boulderers in the world during the late 1980s and early 1990s, she is famous for making the first free ascent of the difficult sheer rock face of The Nose on El Capitan in Yosemite Valley, and for repeating it the next year in less than 24 hours.