Hamilton is also a high mountain climber with over 30 years experience climbing the Himalayas. She had climbed K2, which is part of the Karakoram Range and known as the "Savage Mountain" due to the difficulty of ascent, with the second highest fatality rate among those who attempt to climb it. For every four people who have reached the summit, one has died trying. Over the years, Hamilton made nine different trips to different mountains of the Himalayas. She also visited the former kingdom of Sikkim as a guest of Tashi Namgyal, the ruling Chogyal (King) of Sikkim and the royal family.