Adrian Ballinger (born February 25, 1976) is a British-American certified mountain guide, sponsored climber and skier. Ballinger is the founder and CEO of Alpenglow Expeditions, and has been guiding full-time for 25 years. He has led over 150 international climbing expeditions on six continents, and made 18 successful summits of 8,000m peaks. He is known for pioneering the use of pre-acclimatization for commercial expeditions as early as 2012. Adrian is the only American to have made three successful ski descents of 8,000m peaks, including the first ski descent of Manaslu from its summit. He is also the fourth American to have summited both Mount Everest and K2 without the use of supplemental oxygen.