Most vertical feet skied uphill in 24 hours (female)
According to Official Guinness Records,
The most vertical feet skied uphill by a female is 10,071.8 m (33,044 ft) by Dina Mishev (USA) at the Sunlight Mountain Resort in Glenwood Springs, Colorado, USA, on 8 February 2009. Mrs. Mishev set the record at the resort's "24 Hours of Sunlight" event. The elevation profile was verified by the resort's assistant general manager, Ross Terry, and an additional witness statement was provided by Chrissy Roll, who witnessed each of Mishev's laps of the course. Mishev actually skied a total of 34,546 vertical feet in the 24 hours, but her last lap was not counted because it concluded after the 24-hour window had closed. Witnesses say Mishev rested once -- for 9 minutes -- after her ninth lap of the course. She skied enough to summit Mount Everest and still have 4,015 feet to spare.