glaciers

NPS: "Snow blankets Grand Teton National Park in winter. As spring approaches that blanket shrinks; however, even in the heat of summer, snow and ice are present in the form of glaciers and snowfields. An average of 450 inches of snow falls in the Teton Range each year, feeding the glaciers and snowfields each winter, while the warm temperatures of the summer season eat away at this surplus of snow. Today, summer melt is outpacing winter snowfall and the glaciers are retreating."  " Starting over two million years ago, ice flowed across this valley many times only to melt and begin again. At one point, ice over 3,000 feet thick flowed south from Yellowstone and across the valley floor burying the town of Jackson with 1,500 feet of ice. "  "For a good view of a glacier, drive four miles north from Moose along the inside park road to the Teton Glacier turnout. You will find an interpretive sign that will illustrate where the glacier can be found on the range."

"“For a glacier to remain a constant size, snowfall at the top must equal melting at the bottom. More snowfall causes a glacier to advance, meaning to grow larger. Less snowfall results in retreat. At any size, to be called a glacier, snow fall compacted into ice must flow under the pull of gravity" - waymarking.com

"The majority of the glaciers in the Tetons have north or east aspect, with the exception of Falling Ice Glacier on Mount Moran, which faces southeast. All the glaciers are located on the east slope of the mountain range, and like the glaciers of the Wind River Range, this is most likely due to the decreased solar radiation and predominantly westerly winds (Fryxell, 1935)." - glaciers.us
" All of the existing glaciers in Grand Teton National Park were created during the Little Ice Age (1350–1850 A.D.) and have been in a general state of retreat since the mid-1800s" - wikipedia
"Schoolroom Glacier is a small glacier in Grand Teton National Park in the U.S. state of Wyoming.^[2] This Teton Range glacier lies adjacent to the south Cascade Canyon trail at an altitude of 10,400 ft (3,200 m), approximately 12 mi (19 km) from the trailhead at Jenny Lake. " wikipedia