Siskiyou County

County in California

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Report created October 27, 2026 at www.firezones.info/county/093/siskiyou

  • Fire hazard severity zones

    Share of the land in each CAL FIRE hazard class

    27% Very High

    Most 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

    45% has burned

    Most recently the 2025 Willow Fire, which burned 8 acres here, one of 1,144 fires on record.

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  • Power line fire risk

    Share of the land in the High Fire-Threat District

    67% Elevated · 2% 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 1,079,550 acres · 1,063,105 state, 16,446 local 27%
  2. High 323,537 acres · 282,004 state, 41,533 local 8%
  3. Moderate 48,796 acres · 38,843 state, 9,953 local 1%
  4. Non-wildland 71,468 acres · Local Responsibility Area 2%
  5. Not mapped by CAL FIRE 2,539,032 acres · Mostly federal land 63%

4,062,383 acres of land in all, 1,383,951 in the State Responsibility Area and 139,400 in the Local. 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. 2021 Antelope Fire Cause: Lightning 145,593 acres
  2. 2014 Frying Pan Fire Cause: Lightning 133,154 acres
  3. 2021 River Complex Of 199,354 acres in all · Cause: Lightning 99,364 acres
  4. 1910 Glass Mountain Fire Of 146,968 acres in all · Cause: Lightning 95,005 acres
  5. 2021 Mccash Fire Cause: Lightning 94,948 acres
  6. 2020 Slater Fire Of 157,430 acres in all 80,736 acres
  7. 2017 Oak Fire Of 91,125 acres in all · Cause: Lightning 69,546 acres
  8. 1987 King Titus Fire Cause: Lightning 68,071 acres
  9. 2017 Wallow Fire Cause: Lightning 63,771 acres
  10. 2022 Mckinney Fire 60,092 acres

And 1,134 smaller fires. In all, 1,831,747 acres of Siskiyou 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

Cities and towns in Siskiyou County

Unincorporated communities in Siskiyou County

ZIP codes in Siskiyou County

Neighboring counties

  1. Siskiyou County 27% Very High · this area
  2. Del Norte County 7% Very High
  3. Humboldt County 21% Very High
  4. Modoc County 11% Very High
  5. Shasta County 49% Very High
  6. Trinity County 23% Very High