Keystone in Pennington County, South Dakota — The American Midwest (Upper Plains)

U.S. 4th Cavalry Bivouac

Photographed by William Fischer, Jr., September 17, 2026

1. U.S. 4th Cavalry Bivouac Marker

Inscription.

The U.S. 4th Cavalry is on bivouac in the 1930s.
As part of their training they set up a temporary,
overnight camp in Keystone.

Erected 2005 by Keystone Area Historical Society. (Marker Number 15.)

Topics. This historical marker is listed in this topic list: Military.

Location. 43° 53.768′ N, 103° 25.181′ W. Marker is in Keystone, South Dakota, in Pennington County. It is at the intersection of Mitchell Street and 2nd Street, on the left when traveling west on Mitchell Street. Touch for map. Marker is at or near this postal address: 401 Mitchell Street, Keystone SD 57751, United States of America. Touch for directions.

Regionally, this marker is in West River,

in the Badlands,

and in Greater Rapid City.

It is also in the American Black Hills,

in the Lewis & Clark Corridor,

on the prairies,

and on the Northern Plains.

Globally, it is in North America,

the Western Hemisphere,

the Western World,

and the Anglosphere.

Historically, it finds itself in what was once Rupert’s Land

and also the Louisiana Purchase.

Other nearby markers. At least 8 other

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markers are within walking distance of this marker: Historic Keystone in the early 1940s (a few steps from this marker); Halley's Store Icehouse (within shouting distance of this marker); Keystone Battle Creek Cultural Center (within shouting distance of this marker); Keystone Trading Company/Halley's Store (within shouting distance of this marker); Medical Office of Eugene B. Hultz, M.D. (within shouting distance of this marker); First School (within shouting distance of this marker); US Forest Service Icehouse (within shouting distance of this marker); Site of Ernest "Peg Leg" Haase Blacksmith Shop (about 300 feet away, measured in a direct line). Touch for a list and map of all markers in Keystone.

Also see . . . Keystone SD Walking Tour. (Submitted on October 2, 2026, by William Fischer, Jr. of Reynoldsburg, Ohio.)

Photographed by William Fischer, Jr., September 17, 2026

2. U.S. 4th Cavalry Bivouac Marker

Shows bivouac area today

Credits. This page was last revised on October 2, 2026. It was originally submitted on October 2, 2026, by William Fischer, Jr. of Reynoldsburg, Ohio. This page has been viewed 4 times since then. Photos: 1, 2. submitted on October 2, 2026, by William Fischer, Jr. of Reynoldsburg, Ohio.