these peaks between Avalanche and Cascade Canyons make up the often-photographed Cathedral Group. The most prominent peak north of Cascade Canyon is the monolithic Mount Moran () which rises above Jackson Lake. To the north of Mount Moran, the range eventually merges into the high altitude Yellowstone Plateau. South of the central Cathedral Group the Teton Range tapers off near Teton Pass and blends into the Snake River Range. West to east trending canyons provides easier access by foot into the heart of the range as no vehicular roads traverse the range except at Teton Pass, which is south of the park. Carved by a combination of glacier activity as well as numerous streams, the canyons are at their lowest point along the eastern margin of the range at Jackson Hole. Flowing from higher to lower elevations, the glaciers created more than a dozen U-shaped valleys throughout the range. Cascade Canyon is sandwiched between Mount Owen and Teewinot Mountain to the south and Symmetry Spire to the north and is situated immediately west of Jenny Lake. North to south, Webb, Moran, Paintbrush, Cascade, Death and Granite Canyons slice through Teton Range. Jackson Hole Jackson Hole is a by wide graben valley with an average elevation of , its lowest point is near the southern park boundary at . The valley sits east of the Teton Range and is vertically displaced downward , making the Teton Fault and its parallel twin on the east side of the valley normal faults with the Jackson Hole block being the hanging wall and the Teton Mountain block being the footwall. Grand Teton National Park contains the major part of both blocks. Erosion of the range provided sediment in the valley so the topographic relief is only . Jackson Hole is comparatively flat, with only a modest increase in altitude south to north; however, a few isolated buttes such as Blacktail Butte and hills including Signal Mountain dot the valley floor. In addition to a few outcroppings, the Snake River has eroded terraces into Jackson Hole. Southeast of Jackson Lake, glacial depressions known as kettles are numerous. The kettles were formed when ice situated under gravel outwash from ice sheets melted as the glaciers retreated. Lakes and rivers Most of the lakes in the park were formed by glaciers and the largest of these lakes are located at the base of the Teton Range. In