Tuolumne County

County in California

Search for an address

Report created October 27, 2026 at www.firezones.info/county/109/tuolumne

  • Fire hazard severity zones

    Share of the land in each CAL FIRE hazard class

    17% Very High

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

    Open map

  • Fire history

    Share of the land inside a recorded wildfire perimeter

    36% has burned

    Most recently the 2025 Gianelli Fire, which burned 373 acres here, one of 596 fires on record.

    Open map

  • Power line fire risk

    Share of the land in the High Fire-Threat District

    10% 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.

    Open map

Land by hazard class

  1. Very High 240,984 acres · 239,714 state, 1,270 local 17%
  2. High 115,152 acres · 114,408 state, 744 local 8%
  3. Moderate 4,184 acres · State Responsibility Area <1%
  4. Not mapped by CAL FIRE 1,095,333 acres · Mostly federal land 75%

1,455,654 acres of land in all, 358,306 in the State Responsibility Area and 2,015 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. 2013 Rim Fire Of 256,176 acres in all · Cause: Campfire 249,445 acres
  2. 1996 Ackerson Fire Cause: Lightning 59,105 acres
  3. 1987 Paper Fire Cause: Lightning 45,020 acres
  4. 1949 Unnamed fire 26,378 acres
  5. 2018 Donnell Fire Of 36,461 acres in all · Cause: Campfire 23,436 acres
  6. 1996 Rogge Fire Cause: Lightning 20,944 acres
  7. 1973 Granite Fire Cause: Equipment use 16,290 acres
  8. 1987 Hamm Fire Of 33,144 acres in all · Cause: Lightning 16,212 acres
  9. 1927 Unnamed fire 15,822 acres
  10. 1920 Unnamed fire 13,344 acres

And 586 smaller fires. In all, 520,364 acres of Tuolumne 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 Tuolumne County

Unincorporated communities in Tuolumne County

ZIP codes in Tuolumne County

Neighboring counties

  1. Tuolumne County 17% Very High · this area
  2. Alpine County 3% High · 3% Very High
  3. Calaveras County 54% Very High
  4. Madera County 9% Very High
  5. Mariposa County 23% Very High
  6. Merced County 9% Very High
  7. Mono County 7% High · 1% Very High
  8. Stanislaus County 22% Very High