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| City | Island Mountain |
| State | California (CA) |
| County | Trinity |
| Country | United States of America |
| Timezone | Pacific Time (America/Los_Angeles) |
| Latitude | 40.026261 |
| Longitude | -123.490301 |
| Population | 180 |
| Density | 2.0 /km² |
| Incorporated | N/A |
| ZIP Code(s) | 95595, 95519 |
| Area Code | 530 |
| County Seat | Weaverville |
Island Mountain is a locality in Trinity County, California, United States. It is a small community with a population of 180. The population density is 2.0 people per km². Island Mountain is located at 40.0263°N, 123.4903°W. It observes the Pacific Time (America/Los_Angeles) timezone. ZIP code: 95519.
Island Mountain rises from the wilder edges of Trinity County, a place where the Pacific's damp breath still struggles to reach inland, leaving a landscape of rugged, timber-clad slopes that plunge into deep canyons. It lies 64.3 miles south-south-east of Eureka, CA (from Eureka, CA: bearing 146°T), and is situated 16.9 miles east-south-east of Garberville. The air here carries the clean, resinous scent of Douglas fir and ponderosa pine, a fragrance that intensifies in the cool, shadowed valleys where unseen creeks murmur over moss-slicked stones. Sunlight, when it breaks through the dense canopy, falls in broad, golden shafts, illuminating patches of ferns and the occasional flash of a Steller's jay's iridescent blue. The terrain itself is a testament to the earth's slow, powerful forces, a jumble of steep inclines and narrow ridges, demanding a deliberate, mindful approach from anyone traversing its wild heart. The history of Island Mountain is as intertwined with the land as the ancient oaks themselves, a story shaped by logging and a resilient independence. For generations, the economy here was tethered to the extraction of timber, the rhythmic growl of chainsaws once a familiar sound echoing through these hills. Now, the pace has softened, the echoes fading into a quieter existence. While the grand logging operations have largely ceased, a spirit of self-sufficiency persists, with many residents finding sustenance through smaller-scale ranching or the quiet cultivation of gardens that spill over with produce. The isolation that once defined Island Mountain has also fostered a distinct character, a community that values its privacy and the enduring connection to the wild beauty that surrounds it.
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This page provides an embedded street and satellite map of Island Mountain, California — switch between views using the small square in the bottom left-hand corner of the map. Coordinates: 40.026261, -123.490301. Live weather conditions are sourced directly from the National Weather Service, with current observations and a 7-day forecast also powered by Open-Meteo. Real-time local news and world news feeds keep the page current, while a Wikipedia summary or an editorially written description provides background on Island Mountain and Trinity County.
Detailed location data for Island Mountain includes the ZIP code (95595), telephone area code (530), county seat of Trinity County (Weaverville), and school district assignment. These are among the most commonly searched location details for any US city or town.
Location data is drawn from the USGS Geographic Names Information System (GNIS) and cross-verified against 2020 US Census records by coordinate proximity — ensuring the correct Island Mountain is identified even where the name is shared across multiple counties or states. Population figures are sourced from the 2020 US Census.
| Page generated | July 2026 |
| Location data | SimpleMaps US Cities Database; coordinates matched to USGS GNIS definitive data |
| Wikipedia validation | Article content matched to USGS GNIS coordinates via Wikipedia geosearch API. Location verified by proximity — not name matching alone. |