Hell's Half Acre, Geological formation in Natrona County, Wyoming.
Hell's Half Acre is a cuesta in Natrona County, Wyoming, featuring deep ravines, caves, and eroded earth formations shaped by natural erosion over time. The landscape reveals layers of rock and sediment that expose the geological structure of the region.
The area took its name from early settlers whose characterization of the land stemmed from confusion with other alkali-marked terrain in the region. Indigenous peoples recognized and used the natural features for generations before European settlement.
Native American tribes utilized the natural features of the area by directing bison herds through the ravines during their hunting expeditions.
The site sits about 40 miles (65 km) west of Casper on Highway 20/26 and has a gravel parking area for visitors. Interpretive signs on-site help explain the geological features and how the landscape formed.
The location served as a filming site for a well-known science fiction production, gaining international attention through this connection. This cinematic link brought unexpected visibility to this remote geological site.
Location: Natrona County
GPS coordinates: 43.03810,-107.09300
Latest update: December 20, 2025 14:15
Wyoming preserves geological sites that include thermal springs, canyons, and rock formations. The state protects historic locations such as forts, rock art, and dinosaur tracks. Devils Tower rises 1,267 feet (386 meters) above the terrain and represents a significant geological formation. Fossil...
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