Wyoming, Grand Teton National Park
Publication Year: 1968.
Wyoming, Grand Teton National Park. On 10 August Greenblatt (19) and Robert Green (19) were practicing glissading in the couloir above Amphitheater Lake. According to Green, Greenblatt lost control. He slid a short distance into the rocks and sprained his ankle.
Source: Pete Sinclair, Park Ranger.
Analysis: Lack of knowledge and experience in glissading.