THE TRINITY COUNTY LAND BRIEF
Land in the
Eastern Klamath Low Elevation Forests setting.
Trinity County has 3,179.3 square miles of land in California. 8 mapped landscape regions meet across Trinity County: Eastern Klamath Low Elevation Forests, Outer North Coast Ranges, High North Coast Ranges, among others.
Dissected ridges, valleys and foothills combine varied rock types with diverse conifer and hardwood forests. The Klamath and Siskiyou ranges differ geologically from the volcanic Cascades to the east.
Regional context: Klamath Mountains/California High North Coast Range ↗ · Regional mapping across the county footprint
Where the landscape changes
Trinity County intersects 8 mapped regional units. The largest mapped shares are:
- Eastern Klamath Low Elevation Forests37.2%
- Outer North Coast Ranges12.9%
- High North Coast Ranges11.8%
- Western Klamath Low Elevation Forests11.6%
- Scott Mountains9.2%
Finding your parcel within Trinity County
The atlas lists 14 cities, towns, townships, and Census communities associated with Trinity County, including Hayfork, Ruth, Mad River. The list includes overlapping geography types and does not divide the county into exclusive service areas.
Trinity County by land and water
The Census records 28.3 square miles of water within Trinity County, or 0.9% of its total area. That share is close to Trinity County’s 0.9%. This is geographic context; waterfront status and usable land must be checked at the parcel.
For scale, Trinity County has 44.1 times the land area of nearby Hayfork CDP (72.1 square miles). These areas describe boundaries, not comparable property prices.
The Census boundary meets Humboldt County, Mendocino County, Shasta County, Siskiyou County, Tehama County within California. A tract near one of these lines should be matched to the county identifier on its own records.

