Libby Sauter (born October 8, 1984) is an American mountaineer, rock climber, and pediatric cardiac intensive care nurse educator. She and her climbing partner, Mayan Smith-Gobat, set the women's speed record climbing The Nose on El Capitan, Yosemite National Park, in 2014. In 2017, she became the youngest woman inducted into the American Alpine Club hall of fame. She was the first woman to walk the Lost Arrow Spire highline in 2007.