Trinity County

County in California

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Report created October 27, 2026 at www.firezones.info/county/105/trinity

  • Fire hazard severity zones

    Share of the land in each CAL FIRE hazard class

    23% Very High

    All of the Very High land is in the State Responsibility Area, where the State Fire Marshal's zones apply.

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  • Fire history

    Share of the land inside a recorded wildfire perimeter

    60% has burned

    Most recently the 2025 Cedar Fire, which burned 91 acres here, one of 630 fires on record.

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  • Power line fire risk

    Share of the land in the High Fire-Threat District

    93% Elevated · <1% Extreme

    Utilities may shut off power in the CPUC High Fire-Threat District in fire weather, and homes outside it can lose power when their lines run through it.

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Land by hazard class

  1. Very High 471,699 acres · State Responsibility Area 23%
  2. High 13,683 acres · State Responsibility Area 1%
  3. Moderate 3,186 acres · State Responsibility Area <1%
  4. Not mapped by CAL FIRE 1,564,357 acres · Mostly federal land 76%

2,052,925 acres of land in all, 488,568 of it in the State Responsibility Area. State zones are the ones the State Fire Marshal designated, in effect since 1 April 2024. Local zones are CAL FIRE's 2025 recommendation, which each city or county adopts by ordinance and can make stricter. How to read fire zones

Largest fires

  1. 2020 August Complex Of 1,032,700 acres in all · Cause: Lightning 387,007 acres
  2. 2021 Monument Fire Cause: Lightning 223,108 acres
  3. 2021 River Complex Of 199,354 acres in all · Cause: Lightning 99,897 acres
  4. 2015 Happy Fire Cause: Lightning 67,550 acres
  5. 1999 Megram Fire Of 125,073 acres in all · Cause: Lightning 65,820 acres
  6. 2006 Bake-Oven Fire Of 65,050 acres in all · Cause: Lightning 63,281 acres
  7. 2020 Red Salmon Complex Of 143,836 acres in all · Cause: Lightning 52,517 acres
  8. 2006 Pigeon Fire Cause: Miscellaneous 35,091 acres
  9. 2008 Eagle Fire Cause: Lightning 32,023 acres
  10. 2008 Yellow Fire Cause: Lightning 31,681 acres

And 620 smaller fires. In all, 1,224,078 acres of Trinity County have burned. Acres are the land each fire burned here, and fires that crossed less than an acre are not counted. Some older or smaller fires may be missing, and a fire perimeter can include unburned patches. How to read fire history

Sources

Fire hazard severity zones
CAL FIRE Office of the State Fire Marshal
State map published 27 June 2025, local map 2 February 2026
Fire history
CAL FIRE Fire and Resource Assessment Program
Published 28 July 2026
Power line fire risk
California Public Utilities Commission
Published 23 February 2026

This site is independent and not affiliated with CAL FIRE or the CPUC, so for an official determination, check with the agency or your city or county. How we read the data

Nearby areas

Unincorporated communities in Trinity County

ZIP codes in Trinity County

Neighboring counties

  1. Trinity County 23% Very High · this area
  2. Humboldt County 21% Very High
  3. Mendocino County 36% Very High
  4. Shasta County 49% Very High
  5. Siskiyou County 27% Very High
  6. Tehama County 40% Very High