RoadsideThoughts
A Gazetteer for the United States and Canada
Home >> State of California >> Trinity County >> Island MountainIndex...










Learn About
The Commemorative
Quarter for
California


The Commemorative Quarter for California







Welcome to Island Mountain ...

Island Mountain is located in Trinity County<1>.

While we don't have a date for the founding of Island Mountain, you might consider that their post office opened  in 1915.

A typical abbreviation for Island Mountain: Island Mtn. (or less commonly used: Island Mntn.)

Island Mountain is 530 feet [162 m] above sea level.<2>.

Time Zone: Island Mountain lies in the Pacific Time Zone (PST/PDT) and observes daylight saving time

Communities Also Named Island Mountain ...

Using our Gazetteer, we found another community named Island Mountain - it's located in Nevada.

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

Communities near Island Mountain ...

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

  • Bell Springs ‑ Historic
    (7 miles [11.3 km] to the southwest)
    • Jump to our Gazetteer entry for Bell Springs
    • Bell Springs is located in Mendocino County
  • Harris
    (9 miles [14.5 km] to the northwest)
    • Jump to our Gazetteer entry for Harris
    • Harris is located in Humboldt County
  • Spyrock
    (10 miles [16.1 km] to the south)
    • Note: We haven't been able to verify our GPS coordinates for Spyrock. Although the coordinates have been estimated, they should be in the vicinity.<3>
    • Jump to our Gazetteer entry for Spyrock
    • Spyrock is located in Mendocino County
  • Alderpoint
    (12 miles [19.3 km] to the northwest)
  • Zenia
    (12 miles [19.3 km] to the north)
  • Cooks Valley
    (15 miles [24.1 km] to the west)
    • Note: The GPS coordinates that we are using for Cooks Valley have been provided by the GNIS.<5> The coordinates still need to be verified.
    • Jump to our Gazetteer entry for Cooks Valley
    • Cooks Valley is located in Humboldt County
  • Fort Seward
    (15 miles [24.1 km] to the northwest)
    • Note: The GPS coordinates that we are using for Fort Seward have been provided by the GNIS.<5> The coordinates still need to be verified.
    • Jump to our Gazetteer entry for Fort Seward
    • Fort Seward is located in Humboldt County
  • Bowman Place
    (16 miles [25.7 km] to the south)
    • Jump to our Gazetteer entry for Bowman Place
    • Bowman Place is located in Mendocino County
  • Garberville
    (16 miles [25.7 km] to the west)
  • Leggett
    (16 miles [25.7 km] to the southwest)

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 Island Mountain. Our list includes the location of those cemeteries and we provide an overhead view. See our Cemetery List for Island Mountain.

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

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

TripAdvisor Tourism Pages for Island Mountain ...

Looking for more information about Island Mountain? A wonderful source is the TripAdvisor website. We always start with the TripAdvisor Tourism page, where you can read an overview with links that will help you find lodging, restaurants and attractions.

While we are unaware of a Tourism page that is specific to Island Mountain, there are neighboring communities that do have Tourism pages. A map of those communities can be found with our TripAdvisor Page for Island Mountain.

Adding Island Mountain to Our Gazetteer ...

We originally found mention of Island Mountain 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 Island Mountain was in the document titled List of Post Offices from Cameron Blevins and Richard Helbock.<6>

X2X - From that list, the Island Mountain post office opened in 1915.

We also found Island Mountain mentioned on a train schedule titled Southern Pacific Railroad Time Tables (July 1929).

For more details, see References and Mentions for Island Mountain.

Unfortunately, we don't know of a website for Island Mountain. If you can help, please contact us through our Feedback Page.

The official website for Trinity County: www.trinitycounty.org/

The official website for State of California: https://www.ca.gov/

Footnotes ...

<1>If you're interested in how the shape of California's counties, including Trinity, have changed over time, we recommend the Atlas of Historical County Boundaries.
<2>The elevation is an estimate for the area around Island Mountain - it will be higher in some places and lower in others.
<3>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.
<4>While we're fans and frequent users of TripAdvisor, you should know that we're also members of the TripAdvisor affiliate program.
<5>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.
<6>A copy of their list with background information can be found at:

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









 

Copyright 2025
All Rights Reserved

Thank you for visiting our website.

In closing, please keep in mind that we can not guarantee the accuracy or timeliness of the information on this website, so use with care. We encourage you to double-check the information that is critical to you.

If you've found an error or have additional information that you would like to share, please don't hesitate to write: Click here to contact us.

This page was last modified/updated: 28 Apr 2025