• The Cathedral Group from the Teton Park Road

    Grand Teton

    National Park Wyoming

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  • Bears are active in Grand Teton

    Black and grizzly bears are roaming throughout the park--near roads, trails and in backcountry areas. Hikers and backcountry users are advised to travel in groups of three or more, make noise and carry bear spray. Visitors must stay 100 yards from bears. More »

  • Area closure in the area around Baxter's Pinnacle

    An area closure is in effect around Baxter's Pinnacle to protect nesting peregrine falcons. This closure precludes any climbs of Baxter's Pinnacle and usage of the walk-off gully. This closure will be in effect through 8-15-2013. More »

Mountains

Teton Range first snow
The high peaks -- Middle Teton, Grand Teton and Mount Owen -- from south to north.
 

Grand Teton National Park inspires your sense of wonder. Magnificent mountains tower over a valley bisected by the Snake River. This beautiful valley, overlooked on the western edge by an impressive skyline, is known as Jackson Hole. The Teton Range dominates the landscape of the park.

The range began rising about 10 million years ago. Numerous earthquakes, up to a magnitude 7.5, released tension along the Teton fault building the mountains one step at a time. Each large earthquake breaks the ground by about ten feet dropping the valley floor three to four times as much as the mountains rise. The Grand Teton at 13,770 feet, towers about 7,000 feet above the valley floor suggesting the offset across the fault is up to 30,000 feet. The lack of foothills is due to the presence of the Teton fault.

Erosion fills the valley and carves the range crest forming the jagged Teton skyline. The rugged terrain and lack of foothills allures outdoor enthusiasts of all types to visit this area. Climbers summit at least 12 peaks in the Teton Range over 12,000 feet high with varying degrees of difficulty.

What's shaking in the Intermountain West (Montana, Idaho, Wyoming, Nevada, Utah, Colorado, Arizona and New Mexico)? Visit the "Recent Earthquakes in the Intermountain West" website to learn about recent earthquakes in the area. The site provides local magnitude, times of occurrence and proximity to local towns and cities.

To learn more about the geology of Grand Teton National Park, watch our video podcasts and a geology animation video.

Read our geology brochure for additional information.

Did You Know?

Tetons from Hurricane Pass, KF

Did you know that Grand Teton National Park was established in both 1929 and 1950? The original 1929 park protected the mountain peaks and the lakes near the base. The boundaries were later expanded in 1950 to include much of the adjacent valley floor.