Are the Tetons still rising?

This active fault-block runs north and south for about 40 miles, where the land that makes up the west block is rising upward (The Teton Range), and the east block is lowering (Jackson Hole Valley). And as these geological forces are still at work today, the mountains of the Teton Range are continuing to grow.



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The Teton Fault in Wyoming is a 60-70km long feature that follows the base of the Teton Range along the east side. Data from a previous trenching study in the 1990's showed evidence of large earthquakes during the Holocene (about 11,700 years ago to present).

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Stones and boulders crashed hundreds of feet down both sides of the ridge to the Teepe and Teton Glaciers below. “I think it's the most dramatic rockfall,” Horton said of his lifetime in the Tetons. But the extent to which the world-famous skyline was forever altered went unseen initially, perhaps because of weather.

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As the summer progresses and streamflows recede, it's becoming increasingly apparent that Teton County is in a “Severe Drought.” In summer and fall 2021, we observed 30-year low streamflows in a few tributaries, including the Buffalo Fork, the Gros Ventre, Pacific Creek, Cache Creek, and others.

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Grand Teton is famous for spectacular mountain scenery and wildlife. Park boundaries include approximately 310,000 acres, 485 square miles.

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The park has generally good air quality but is affected by air pollution from power plants, agricultural areas, industry, and oil and gas development. Pollutants emitted from these sources can harm the park's natural and scenic resources such as surface waters, vegetation, fish, and visibility.

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