Hikers walk beneath Sexton Glacier and Going-to-the-Sun Mountain in Glacier National Park, Montana, USA.
Hikers walk beneath Sexton Glacier and Going-to-the-Sun Mountain in Glacier National Park, Montana, USA. Hike Siyeh Pass, a gorgeous traverse of 10.3 miles (2300 feet up, 3500 feet down) starting at Siyeh Bend, through Preston Park, and finishing down beautiful Baring Creek Valley. Since 1932, Canada and USA have shared Waterton-Glacier International Peace Park, which UNESCO declared a World Heritage Site (1995) containing two Biosphere Reserves (1976). Rocks in the park are primarily sedimentary layers deposited in shallow seas over 1.6 billion to 800 million years ago. During the tectonic formation of the Rocky Mountains 170 million years ago, the Lewis Overthrust displaced these old rocks over newer Cretaceous age rocks. Glaciers carved spectacular U-shaped valleys and pyramidal peaks as recently as the Last Glacial Maximum (the last "Ice Age" 25,000 to 13,000 years ago). Of the 150 glaciers existing in the mid 1800s, only 25 active glaciers remain in the park as of 2010, and all may disappear by 2020, say climate scientists.Add to Cart Add to Lightbox Download