Near Casper in Natrona County, Wyoming — The American West (Mountains)
Hell’s Half Acre
Photographed by Barry Swackhamer, August 23, 2014
1. Hell’s Half Acre Marker
This unique setting of natural beauty cover approximately 320 acres. Viewed from a point of maximum depth, its walls and pinnacles show soft and varied hues comparable to the Grand Canyon of the Yellowstone.
Investigation has confirmed that in former days the Indians drove great herds of buffalo into this depression for slaughter. Flint arrowheads and buffalo bones have been found here. A detachment of Captain B.L.E. Bonneville’s party visited this site in July 1833. This area has been dedicated to Natrona county by the Federal Government.
Erected by Historical Landmark Commission of Wyoming.
Topics. This historical marker is listed in this topic list: Natural Features. A significant historical month for this entry is July 1833.
Location. Marker has been permanently removed. It was located near 43° 2.814′ N, 107° 5.538′ W. Marker was near Casper, Wyoming, in Natrona County. It was on U.S. 20/26, on the left when traveling west. Touch for map. Marker was at or near this postal address: 40583 Highway 20, Casper WY 82604, United States of America.
We have been informed that this marker is no longer there and will not be replaced. This page is an archival view of what was.
Regionally, this marker was in Wyoming’s Westward Expansion Trails Region. It was also in the American Mountain West. Globally, it was in North America, the Rocky Mountains, the Western Hemisphere, the Western World, and the Anglosphere.
Other nearby markers.
this page online
More about this marker. Hell's Half Acre is approximately 40 miles east of Casper, WY.
Also see . . . Hell’s Half Acre Is One Of The Most Mesmerizing Natural Wonders In All Of Wyoming. Only in Your State website entry (Submitted on September 5, 2023, by Larry Gertner of New York, New York.)
Photographed by Barry Swackhamer, August 23, 2014
2. Hell’s Half Acre Marker
Photographed by Barry Swackhamer, August 23, 2014
3. Hell’s Half Acre
Photographed by Barry Swackhamer, August 23, 2014
4. Hell’s Half Acre
Photographed by Sanborn Souvenir Company, circa 1935
5. The Painted Cliffs, Hell's Half Acre, Wyoming
Photographed by Barry Swackhamer, August 23, 2014
6. Hell’s Half Acre
Photographed by Ian Lefkowitz, July 31, 2021
7. Hell’s Half Acre
A view of Hell's Half Acre from the scenic overlook.
Photographed by Doreen Thomson, July 24, 2016
8. Hell’s Half Acre Marker
Credits. This page was last revised on November 22, 2025. It was originally submitted on January 5, 2015, by Barry Swackhamer of Brentwood, California. This page has been viewed 1,918 times since then and 54 times this year. Last updated on November 15, 2025, by Jimmy Emerson of Dalton, Georgia. Photos: 1, 2, 3, 4. submitted on January 5, 2015, by Barry Swackhamer of Brentwood, California. 5. submitted on January 8, 2015. 6. submitted on January 5, 2015, by Barry Swackhamer of Brentwood, California. 7. submitted on April 12, 2025, by Ian Lefkowitz of New York, New York. 8. submitted on August 21, 2025, by Doreen Thomson of Calgary, Alberta Canada. • Devry Becker Jones was the editor who published this page.
