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

Henry Loomis House

Photographed by William Fischer, Jr., September 21, 2026

1. Henry Loomis House Marker

Inscription.

This house, which was built in the 1890s for Henry Loomis and his family, was one of the original residences in Keystone. Mr. Loomis was one of many blacksmiths in Keystone. It also served as the Goodyear Hotel (as shown) and as a boarding house for some of the original Mount Rushmore workers in the 1930s. Later it was returned to a private residence.

[Right photo caption reads]
Some Mount Rushmore workers posing on top of Mount Rushmore in 1932.

Erected 2005 by Keystone Area Historical Society. (Marker Number 1.)

Topics. This historical marker is listed in this topic list: Notable Buildings. A significant historical year for this entry is 1932.

Location. 43° 53.648′ N, 103° 25.09′ W. Marker is in Keystone, South Dakota, in Pennington County. It is on 1st Street (State Highway 40), on the right when traveling north. Touch for map. Marker is at or near this postal address: 208 1st 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,

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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 markers are within walking distance of this marker: Big Thunder Gold Mine (within shouting distance of this marker); Charles Upham and the Upham Saloon (about 300 feet away, measured in a direct line); First Congregational Church (about 400 feet away); Hayes-Hopkins Supply Company (about 400 feet away); Bill Durst (about 400 feet away); William and Jennie Franklin (about 500 feet away); Site of the McDonald Hotel (about 600 feet away); Tom Hoy and the Hoy Drug Store (about 600 feet away). Touch for a list and map of all markers in Keystone.

Also see . . . Historic Keystone Walking Tour. (Submitted on October 4, 2026, by William Fischer, Jr. of Reynoldsburg, Ohio.)

Henry Loomis House and Marker image. Click for full size.

Photographed by William Fischer, Jr., September 21, 2026

2. Henry Loomis House and Marker

Credits. This page was last revised on October 4, 2026. It was originally submitted on October 4, 2026, by William Fischer, Jr. of Reynoldsburg, Ohio. This page has been viewed 3 times since then. Photos: 1, 2. submitted on October 4, 2026, by William Fischer, Jr. of Reynoldsburg, Ohio.