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Welcome to Boulder (aka 'Boulder Basin') ...

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

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

Boulder would have been located within present day Blaine County<2>.

While we don't have a date for the founding of Boulder, you might consider that their post office opened  in 1881.

When the people of Boulder<3> referred to themselves (known as a demonym), they are believed to have used Boulderite<4>

While the community is gone, the present day location for Boulder is 9,150 feet [2,789 m] above sea level.<5> In other words, the elevation of Boulder is about 1¾ mile [or ~2¾ km] above sea level.

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

The Area Codes where Boulder was located: 208 & 986<6>

The community of Boulder has also been called Boulder Basin.

Communities Also Named Boulder ...

Using our Gazetteer, we found that there are 10 communities that are also named Boulder - they are located in British Columbia, California, Colorado (2), Illinois, Montana, Utah, Virginia, West Virginia and Wyoming.

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

Communities near Boulder ...

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

  • Ketchum
    (12 miles [19.3 km] to the southeast)
  • Sun Valley
    (12 miles [19.3 km] to the southeast)
  • Galena
    (7 miles [11.3 km] to the west)
  • Elkhorn Village
    (14 miles [22.5 km] to the southeast)
    • Note: The GPS coordinates that we are using for Elkhorn Village have been provided by the GNIS.<8> The coordinates still need to be verified.
    • Jump to our Gazetteer entry for Elkhorn Village
    • Elkhorn Village is located in Blaine County
  • Sawtooth City
    (17 miles [27.4 km] to the west)
    • Note: The GPS coordinates that we are using for Sawtooth City have been provided by the GNIS.<8> The coordinates still need to be verified.
    • Jump to our Gazetteer entry for Sawtooth City
    • Sawtooth City is located in Blaine County
  • Triumph
    (18 miles [29 km] to the southeast)
    • Note: We haven't been able to verify our GPS coordinates for Triumph. Although the coordinates have been estimated, they should be in the vicinity.<9>
    • Jump to our Gazetteer entry for Triumph
    • Triumph is located in Blaine County
    • Google driving directions:
    • From your current location to Triumph
    • From Boulder to Triumph
  • Hailey
    (24 miles [38.6 km] to the southeast)
    • Note: The GPS coordinates that we are using for Hailey have been provided by the GNIS.<8> The coordinates still need to be verified.
    • Jump to our Gazetteer entry for Hailey
    • Hailey is located in Blaine County
    • Population from the 2020 Census: 8,887 people
    • Jump to TripAdvisor's Tourism page for Hailey <7>
  • Bellevue
    (28 miles [45.1 km] to the southeast)
    • Note: The GPS coordinates that we are using for Bellevue have been provided by the GNIS.<8> The coordinates still need to be verified.
    • Jump to our Gazetteer entry for Bellevue
    • Bellevue is located in Blaine County
    • Population from the 2020 Census: 2,501 people
    • Jump to TripAdvisor's Tourism page for Bellevue <7>
  • Broadford
    (28 miles [45.1 km] to the southeast)
  • Clayton
    (29 miles [46.7 km] to the north)

To Help With Your Genealogy Research ...

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

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

Using the information from an 1895 Atlas, we've created a list of communities that were in the area of Boulder. 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 Boulder.

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

Adding Boulder to Our Gazetteer ...

We originally found mention of Boulder 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 Boulder was in the document titled List of Post Offices from Cameron Blevins and Richard Helbock.<10>

X2X - From that list, the Boulder post office opened in 1881.

For more details, see References and Mentions for Boulder.

The official website for Blaine County: www.co.blaine.id.us/

The official website for State of Idaho: https://idaho.gov/

Footnotes ...

<1>We use the term 'Historic' broadly and it generally means that the community no longer exists. However, it can also mean that the community might still exist, but was significantly larger or had a more 'official' existence in the past than it does now. Unfortunately our sources of data have proven to be unreliable. If you can provide us with more specific information about Boulder, please let us know so that we can improve our accuracy.
<2>If you're interested in how the shape of Idaho's counties, including Blaine, have changed over time, we recommend the Atlas of Historical County Boundaries.
<3>Boulder is also known as Boulder Basin. For more information, please visit our Genealogy Helper Page for Boulder.
<4>A demonym is the name for a resident of a community which is usually derived from (or is related to) the name of that community. In other words, it's how the residents of Boulder refer to themselves. It's important to note that there aren't any rules for taking a community's name and turning it into a demonym. A demonym is informal and while the majority of Boulder may use one name, keep in mind that others may use something different.
<5>The elevation is an estimate for the area around Boulder - it will be higher in some places and lower in others.
<6>When there's a risk of an area code running out of phone numbers, an 'Overlay Area Code' is created that has the same geographic boundaries as the existing area code. In this case, the 208 code has been Overlayed with the 986 area code. New phone numbers in the Boulder area will be assigned with one of these codes: 208 or 986. As a result, placing a call in the Boulder area will require 10-digit dialing (where you enter both the area code and then the phone number).
<7>While we're fans and frequent users of TripAdvisor, you should know that we're also members of the TripAdvisor affiliate program.
<8>The location has been supplied by the Geographic Names Information System - which is maintained by the U.S. Geological Survey (USGS). While these values should be definitive, we found that accuracy can vary and you should double-check the location if accuracy is required.
<9>An 'estimated' location is one where we have been given GPS coordinates, but are unable to verify the accuracy of those coordinates. That said, we have some confidence that we have placed the marker near the actual location. A typical reason for being unable to verify a location is that it might be on private property or maybe historic and gone without an obvious trace.
<10>A copy of their list with background information can be found at:

      https://cblevins.github.io/us-post-offices/data-biography/




 

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This page was last modified/updated: 28 Apr 2025