Hell's Half Acre (Wyoming)

For other uses, see Hell's Half Acre.

Hell's Half Acre
Southwest view from Hell's Half Acre summit
Location	Natrona County, Wyoming
Coordinates	43°02′17″N 107°05′35″W
Area	320 acres (1.3 km2)
Governing body	Natrona County, Wyoming

Hell's Half Acre
Unincorporated community
Country	United States
State	Wyoming
County	Natrona
Elevation	6,033 ft (1,839 m)
Time zone	UTC-7 (Mountain (MST))
• Summer (DST)	UTC-6 (MST)
GNIS feature ID	1589476

Hell's Half Acre is a large scarp located about 40 miles (64 km) west of Casper, Wyoming on US 20/26. Encompassing 320 acres (1.3 km²), this geologic oddity is composed of deep ravines, caves, rock formations and hard-packed eroded earth. Hell's Half Acre was used as the location for the fictional planet of Klendathu in the movie Starship Troopers.

The location was known as "The Devil's Kitchen", "The Pits of Hades", and "The Baby Grand Canyon" until a cowhand appeared and thought he was at Hell's Half Acre, an area southwest of Casper full of alkali and bogs.

Native American tribes used the ravines to drive bison to their death during their hunts.

As of December 2005, the roadside restaurant and motel/campground sitting atop the ravine were closed. The motel and the abandoned restaurant have since been torn down. The area is fenced off and there is no public access to the cliff edge nor the valley itself, but there is an interpretive sign west of the former restaurant. As of July, 2021, the fencing was still in place, but two gates in the fence were open, allowing vehicular access to a large gravel lot (with potholes) and a closer view of the topography.

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  The sign on the restaurant formerly located at Hell's Half Acre.
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  A vertical formation just off the overlook.
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  A cave formation in Hell's Half Acre.
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  Interpretive sign marking Hell's Half Acre.
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  Wind River Formation exposed at Hell's Half Acre