The Barrards' expedition ascended the mountain very slowly, spending nights at 6300, 7100, 7700, 7900, and 8300 meters (20,669; 23,294; 25,262; 25,919; and 27,250 feet, respectively) on the climb. They spent their last night before their summit attempt bivouacked with a tent but no sleeping bags. The Barrards, Rutkiewicz, and Parmentier all summited successfully by 11:00am on June 23, 1986. Wanda Rutkiewicz was the first female ascender of K2, a mere 30 minutes before Liliane Barrard. Both women summited K2 without using supplemental oxygen.