Welcome to Keystone ...

So far, we found very little information about Keystone. The little that we've found leads us believe that the community is historic.<1>

We've added Keystone to our Gazetteer with the hope that we can develop more information. If you can help us with Keystone, please Contact Us.

Keystone would have been located within present day Mineral County<2>.

While we don't have a date for the founding of Keystone, you might consider that their post office opened  in 1913.

While the community is gone, the present day location for Keystone is 3,370 feet [1,027 m] above sea level.<3> In other words, the elevation of Keystone is about ¾ mile [or ~1 km] above sea level.

Time Zone: The area where Keystone was located is in the Mountain Time Zone (MST/MDT) and observes daylight saving time

Note: If you leave Keystone and travel south, you will leave Mountain Time and cross into the Pacific Time Zone (PST/PDT).

The Area Code where Keystone was located: 406

Communities Also Named Keystone ...

Using our Gazetteer, we found that there are 44 communities that are also named Keystone - they are located in Alabama, Arkansas, California (2), Colorado (3), Delaware, Florida, Indiana (2), Iowa, Louisiana (2), Michigan, Minnesota (2), Missouri (2), Nebraska (2), Nevada (4), North Dakota (2), Ohio (2), Oklahoma, Pennsylvania (5), South Dakota, Tennessee, Washington (3), West Virginia (2), Wisconsin and Wyoming.

For more information, see our Tidbits & Trivia Page for Keystone.

Communities near Keystone ...

We have created a list of 10 communities that are near Keystone.

• Plains
  (13 miles [20.9 km] to the north)
  • Jump to our Gazetteer entry for Plains
  • Plains is located in Sanders County
  • Population from the 2020 Census: 1,139 people
  • Jump to TripAdvisor's Tourism page for Plains <4>
• Superior
  (5 miles [8 km] to the southeast)
  • Jump to our Gazetteer entry for Superior
  • Superior is located in Mineral County
  • Population from the 2020 Census: 897 people
  • Jump to TripAdvisor's Tourism page for Superior <4>
• Saint Regis
  (8 miles [12.9 km] to the west)
  • Jump to our Gazetteer entry for Saint Regis
  • Saint Regis is located in Mineral County
  • Jump to TripAdvisor's Tourism page for Saint Regis <4>
• Island City ‑ Historic
  (9 miles [14.5 km] to the northeast)
  • Note: The GPS coordinates that we are using for Island City have been provided by the GNIS.<5> The coordinates still need to be verified.
  • Jump to our Gazetteer entry for Island City
  • Island City is located in Sanders County
• Riverbend
  (9 miles [14.5 km] to the southeast)
  • Note: The GPS coordinates that we are using for Riverbend have been provided by the GNIS.<5> The coordinates still need to be verified.
  • Jump to our Gazetteer entry for Riverbend
  • Riverbend is located in Mineral County
• Paradise
  (10 miles [16.1 km] to the northeast)
  • Note: The GPS coordinates that we are using for Paradise have been provided by the GNIS.<5> The coordinates still need to be verified.
  • Jump to our Gazetteer entry for Paradise
  • Paradise is located in Sanders County
  • Jump to TripAdvisor's Tourism page for Paradise <4>
• Old Town
  (11 miles [17.7 km] to the east)
  • Note: The GPS coordinates that we are using for Old Town have been provided by the GNIS.<5> The coordinates still need to be verified.
  • Jump to our Gazetteer entry for Old Town
  • Old Town is located in Missoula County
• Crescent City ‑ Historic
  (14 miles [22.5 km] to the southeast)
  • Note: The GPS coordinates that we are using for Crescent City have been provided by the GNIS.<5> The coordinates still need to be verified.
  • Jump to our Gazetteer entry for Crescent City
  • Crescent City is located in Mineral County
• Cabin City
  (16 miles [25.7 km] to the northwest)
  • Note: The GPS coordinates that we are using for Cabin City have been provided by the GNIS.<5> The coordinates still need to be verified.
  • Jump to our Gazetteer entry for Cabin City
  • Cabin City is located in Mineral County
• De Borgia
  (20 miles [32.2 km] to the west)
  • Note: The GPS coordinates that we are using for De Borgia have been provided by the GNIS.<5> The coordinates still need to be verified.
  • Jump to our Gazetteer entry for De Borgia
  • De Borgia is located in Mineral County
  • Jump to TripAdvisor's Tourism page for De Borgia <4>

To Help With Your Genealogy Research ...

We have a couple of sections for those tracing their genealogy.

We created a list of cemeteries that are in the area around Keystone. Our list includes the location of those cemeteries and we provide an overhead view. See our Cemetery List for Keystone.

Using the information from an 1895 Atlas, we've created a list of communities that were in the area of Keystone. Our list includes information such as whether the 1895 community had a post office or railroad service. See our List of 1890's Communities around Keystone.

We also have a detailed list of newspapers that have been published in the area around Keystone. See our Newspapers Page for Keystone.

Adding Keystone to Our Gazetteer ...

We originally found mention of Keystone in both the FIPS-55 and the GNIS. For more information, see the FIPS and GNIS Codes sections on our Miscellaneous Page.

From our notes, the earliest published mention we've found for Keystone was in the document titled List of Post Offices from Cameron Blevins and Richard Helbock.<6>

X2X - From that list, the Keystone post office opened in 1913.

We also found Keystone on a map titled Hixson Map of Montana (1950).

For more details, see References and Mentions for Keystone.

Off-the-Road Links ...

The official website for Mineral County: www.co.mineral.mt.us/

The official website for State of Montana: https://mt.gov/