near the Granite Canyon Entrance Station. Geography Grand Teton National Park is located in the northwestern region of the U.S. state of Wyoming. To the north the park is bordered by the John D. Rockefeller Jr. Memorial Parkway, which is administered by Grand Teton National Park. The scenic highway with the same name passes from the southern boundary of Grand Teton National Park to West Thumb in Yellowstone National Park. Grand Teton National Park covers approximately , while the John D. Rockefeller Jr. Memorial Parkway includes . Most of the Jackson Hole valley and virtually all the major mountain peaks of the Teton Range are within the park. The Jedediah Smith Wilderness of Caribou-Targhee National Forest lies along the western boundary and includes the western slopes of the Teton Range. To the northeast and east lie the Teton Wilderness and Gros Ventre Wilderness of Bridger-Teton National Forest. The National Elk Refuge is to the southeast, and migrating herds of elk winter there. Privately owned land borders the park to the south and southwest. Grand Teton National Park, along with Yellowstone National Park, surrounding National Forests and related protected areas constitute the Greater Yellowstone Ecosystem. The Greater Yellowstone Ecosystem spans portions of three states and is one of the largest intact mid-latitude ecosystems remaining on Earth. By road, Grand Teton National Park is from Salt Lake City, Utah and from Denver, Colorado. Teton Range The youngest mountain range in the Rocky Mountains, the Teton Range began forming between 6 and 9 million years ago. It runs roughly north to south and rises from the floor of Jackson Hole without any foothills along a by wide active fault-block mountain front. The range tilts westward, rising abruptly above Jackson Hole valley which lies to the east but more gradually into Teton Valley to the west. A series of earthquakes along the Teton Fault slowly displaced the western side of the fault upward and the eastern side of the fault downward at an average of of displacement every 300–400 years. Most of the displacement of the fault occurred in the last 2 million years. While the fault has experienced up to 7.5-earthquake magnitude events since it formed, it has been relatively quiescent during historical periods, with only a few 5.0-magnitude or greater earthquakes known to have occurred since 1850. In addition to Grand Teton, another nine peaks are over above sea level. Eight of