Grand Teton National Park is an American national park in northwestern Wyoming. At approximately 310,000 acres (1,300 km2), the park includes the major peaks of the 40-mile-long (64 km) Teton Range as well as most of the northern sections of the valley known as Jackson Hole. Grand Teton National Park is only 10 miles (16 km) south of Yellowstone National Park, to which it is connected by the National Park Service–managed John D. Rockefeller Jr. Memorial Parkway. Along with surrounding national forests, these three protected areas constitute the almost 18-million-acre (73,000-square-kilometer) Greater Yellowstone Ecosystem, one of the world's largest intact mid-latitude temperate ecosystems.
Jackson Hole is a valley between the Gros Ventre and Teton mountain ranges in the U.S. state of Wyoming, near the border with Idaho, in Teton County. The term "hole" was used by early trappers, or mountain men, as a term for a large mountain valley. These low-lying valleys, surrounded by mountains and containing rivers and streams, are good habitat for beavers and other fur-bearing animals. Jackson Hole is 55 miles (89 km) long by 6-to-13 miles (10-to-21 km) wide and is a graben valley with an average elevation of 6,800 ft, its lowest point being near the southern park boundary at 6,350 ft.
Jackson Lake is in Grand Teton National Park in northwestern Wyoming. This natural lake was enlarged by the construction of the Jackson Lake Dam, which was originally built in 1911, enlarged in 1916 and rebuilt by 1989. As part of the Minidoka Project the top 33 ft (10 m) of the lake is used by farmers in Idaho for irrigation purposes under water rights legislation that was enacted prior to the establishment of Grand Teton National Park. The lake is the remnant of large glacial gouging from the neighboring Teton Range to the west and the Yellowstone Plateau to the north. The lake is primarily fed by the Snake River, which flows in from the north, and empties at Jackson Lake Dam. Jackson Lake is one of the largest high altitude lakes in the United States, at an elevation of 6,772 ft (2,064 m) above sea level. The lake is up to 15 mi (24 km) long, 7 mi (11 km) wide and 438 ft (134 m) deep. The water of the lake averages below 60 °F (16 °C), even during the summer.
The geology of the Grand Teton area consists of some of the oldest rocks and one of the youngest mountain ranges in North America. The Teton Range, partly located in Grand Teton National Park, started to grow some 9 million years ago. An older feature, Jackson Hole, is a basin that sits aside the range.
Shoshone National Forest is the first federally protected National Forest in the United States and covers nearly 2,500,000 acres (1,000,000 ha) in the state of Wyoming. Originally a part of the Yellowstone Timberland Reserve, the forest is managed by the United States Forest Service and was created by an act of Congress and signed into law by U.S. President Benjamin Harrison in 1891. Shoshone National Forest is one of the first nationally protected land areas anywhere. Native Americans have lived in the region for at least 10,000 years, and when the region was first explored by European adventurers, forestlands were occupied by several different tribes. Never heavily settled or exploited, the forest has retained most of its wildness. Shoshone National Forest is a part of the Greater Yellowstone Ecosystem, a nearly unbroken expanse of federally protected lands encompassing an estimated 20,000,000 acres (8,100,000 ha).
Jenny Lake is located in Grand Teton National Park in the U.S. state of Wyoming. The lake was formed approximately 12,000 years ago by glaciers pushing rock debris which carved Cascade Canyon during the last glacial maximum, forming a terminal moraine which now impounds the lake. The lake is estimated to be 256 feet (78 m) deep and encompasses 1,191 acres (482 ha). Jenny Lake is considered to be a major focal point in Grand Teton National Park, with many hiking trails, scenic boat rides, and quick access to the major climbing routes onto the tallest peaks of the Teton Range.
The Cathedral Group is the group of the tallest mountains of the Teton Range, all of which are located in Grand Teton National Park in the U.S. state of Wyoming. The Cathedral Group are classic alpine peaks, with pyramidal shapes caused by glacial motion. The highest peak in the group is Grand Teton, which rises more than 7,000 feet (2,100 m) above Jackson Hole valley, and is the second tallest mountain in Wyoming, after Gannett Peak. The Cathedral Group is separated by other tall peaks of the range by the Cascade Canyon to the north and Avalanche Canyon to the south.
Cascade Canyon is located in Grand Teton National Park, in the U.S. state of Wyoming. The canyon was formed by glaciers which retreated at the end of the last glacial maximum approximately 15,000 years ago. Today, Cascade Canyon has numerous polished glacial erratics, hanging cirques and a U-shape as evidences that demonstrate that glaciers once filled the canyon to a depth of at least 2,000 feet (610 m). Rock debris that was transported out of the canyon by glacial motion formed moraines which now impound the waters of Jenny Lake which is located at the base of the canyon. Cascade Creek now flows where the glaciers once did and the numerous waterfalls, such as the 100-foot (30 m) tall Hidden Falls, found within the gorge are popular destinations with tourists.
Signal Mountain is an isolated summit standing 7,720 feet (2,350 m) above sea level. The mountain is located in Grand Teton National Park in the U.S. state of Wyoming. The next closest higher summit is more than 10 miles (16 km) distant, and this isolation provides sweeping views of the Teton Range, much of the northern Jackson Hole area as well as the Snake River. Though located adjacent to the Tetons, Signal Mountain was not formed in the same manner or period. The mountain originally was formed by volcanic ashfall from one of the eruptions of the Yellowstone hotspot. The peak is also partially a glacial moraine formed by a receding glacier that came south out of the Yellowstone icecap. This same glacier also created neighboring Jackson Lake.
Bradley Lake is located in Grand Teton National Park, in the U. S. state of Wyoming. The glacially formed lake is located near the terminus of Garnet Canyon. Bradley Lake can be accessed by the Bradley Lake Trail, a 4 miles (6.4 km) roundtrip hike commencing from the Taggart Lake trailhead parking area. The lake is less than one and a half miles (2.4 km) north of Taggart Lake.
Jackson Lake Dam is a concrete and earth-fill dam in the western United States, at the outlet of Jackson Lake in northwestern Wyoming. The lake and dam are situated within Grand Teton National Park in Teton County. The Snake River emerges from the dam and flows about eight hundred miles (1,300 km) through Wyoming, Idaho, Oregon, and Washington to its mouth on the Columbia River in eastern Washington.
The canyons of the Teton Range lie almost entirely within Grand Teton National Park in the U.S. state of Wyoming. Ranging from 9 miles (14 km) to less than 1 mile (1.6 km) in length and up to 6,000 feet (1,800 m) deep, the canyons were carved primarily by glaciers over the past 250,000 years. The canyons in the Teton Range descend in altitude generally west to east and many have lakes at their outlets. The lakes were created by terminal moraines left behind by the now retreated glaciers. A few of the canyons have small glaciers that were created mostly during the Little Ice Age (1550-1850). Fast retreating Schoolroom Glacier is a tiny glacier located at the head of the South Cascade Canyon. Most of the canyons have streams from which rain and snowmelt flow towards Jackson Hole valley, and due to the sometimes rapid altitude descent, waterfalls are common. The canyons offer the easiest hiking access into the Teton Range.
Bearpaw Lake is located in Grand Teton National Park, in the U. S. state of Wyoming. Bearpaw Lake is south of Trapper Lake and north of Leigh Lake. Bearpaw Lake is an easy to moderate 9.2-mile (14.8 km) round trip hike along the Leigh Lake Trail. The trail starts at the String Lake trailhead and wanders north along the east shores of Leigh Lake with a 460 feet (140 m) elevation gain. Bearpaw Lake is nestled at the eastern base of Mount Moran and snow and glacier meltwaters off Skillet Glacier eventually feed into the lake. There are three backcountry camping sites with designated tent pads at the lake and a backcountry permit is required to use these sites.
Delta Lake is located in Grand Teton National Park, in the U.S. state of Wyoming. Delta Lake is situated in Glacier Gulch and is fed rock flour from the Teton Glacier, which turns the water turquoise in appearance. It has been an increasingly popular hiking destination in the park, with the number of hikers increasing 164% from 2016 to 2018. The easiest walk to the lake is by way of the a hike commencing from the Lupine Meadows trailhead. Following the trail to Surprise and Amphitheater Lakes and an off trail effort to the north from Surprise Lake provides access to Delta Lake. The effort is considered strenuous for even getting to Surprise Lake is nearly a ten mile roundtrip with over 3,000 feet (910 m) of elevation gain. Below Delta Lake lies Glacier Falls, an intermittent 300-foot (91 m) waterfall.
The Teton Crest Trail is a 40-mile (64 km) long hiking trail in the U.S. state of Wyoming that extends from Phillips Pass, on the border of Bridger Teton and Caribou-Targhee National Forests, to String Lake in Grand Teton National Park. Backpacker Magazine calls the Trail one of the "Best Hikes Ever," with "mesmerizing and constant views of jagged peaks."
Hurricane Pass is a pedestrian mountain pass located in the Teton Range, Grand Teton National Park, in the U.S. state of Wyoming. Situated at approximately 10,338 ft (3,151 m) above sea level, the pass can be accessed from the south by way of the Teton Crest Trail or from the north via the South Fork Cascade Canyon Trail. From Jenny Lake the roundtrip hike is 24.8 mi (39.9 km) with a 4,500 ft (1,400 m) elevation gain. Schoolroom Glacier is 100 yd (91 m) from the pass. Views of the west slopes of several of the highest Teton Range peaks as well as Alaska Basin and Battleship Mountain in Caribou-Targhee National Forest are available at the pass.
The Garnet Canyon Trail is a 4.8-mile (7.7 km) long hiking trail in Grand Teton National Park in the U.S. state of Wyoming. The trailhead is at the Lupine Meadows parking area and climbs steeply more than 2,500 feet (760 m) in just under 5 miles (8.0 km) into Garnet Canyon. At the 2-mile (3.2 km) point, the trail forks from the Amphitheater Lake Trail and heads south and then west into Garnet Canyon. Garnet Canyon is the most popular approach route for climbers attempting to summit not only Grand Teton but also Middle Teton, South Teton, Teepe Pillar and Disappointment Peak. Though the trail becomes unmaintained once it enters boulder fields at approximately the 9,500-foot (2,900 m) elevation point, climbers continue on to other destinations such as the Lower Saddle, a high altitude mountain pass situated between Middle and Grand Teton. The altitude gain from the Lupine Meadows trailhead to the Lower Saddle is nearly 5,000 feet (1,500 m).
The Valley Trail is a 40-mile (64 km) long hiking trail in Grand Teton National Park in the U.S. state of Wyoming. Though the trail can be accessed at numerous trailheads in Grand Teton National Park, the southern terminus is near Teton Village, Wyoming, just outside the park. Heading north from Teton Village, the Valley Trail flanks the base of the Teton Range and skirts the shores of Phelps, Taggart, Bradley, Jenny, String, Leigh, Bearpaw and Trapper Lakes. Along its 40-mile (64 km) length, it is sometimes known by other names such as the Jenny Lake Trail or the String Lake Trail.
The following articles relate to the history, geography, geology, flora, fauna, structures and recreation in Grand Teton National Park.
