Mont Blanc massif led to calls to limit access to the most popular summits and for the mountains to be treated with greater respect. The Mont Blanc massif has provided numerous opportunities for academic research, dating back to the very first ascent of Mont Blanc in 1786 during which Michel Paccard carried scientific equipment to confirm it as the highest summit. In 1820, an ill-fated expedition led by Dr Hamel included pigeons intended for release at varying altitudes to measure the impact of reduced air density on their ability to fly. In 1890, Joseph Vallot built a small meteorological observatory at approximately between
Teewinot Mountain other peaks of the range into their current shapes. Broken Falls is one of the tallest cascades in Grand Teton National Park and descends down the eastern slopes of Teewinot Mountain. Teewinot Mountain is most easily ascended via the eastern face, which finishes with a somewhat exposed Class 4 scramble to the tiny summit. An unmarked climbers' trail, known as the Apex Trail, leads most of the way up the mountain from the Lupine Meadows area. Geology of the Grand Teton area Teewinot Mountain Teewinot Mountain () is the sixth highest peak in the Teton Range, Grand Teton National Park,