San Bernardino County

Summary

• Fire hazard severity zones

  Share of the land in each CAL FIRE hazard class

  Map
  1. Very High 263,521 acres · 146,088 state, 117,433 local 2%
  2. High 232,390 acres · 82,218 state, 150,172 local 2%
  3. Moderate 1,612,032 acres · 116,226 state, 1,495,806 local 13%
  4. Non-wildland 330,220 acres · Local Responsibility Area 3%
  5. Not mapped by CAL FIRE 10,429,303 acres · Mostly federal land 81%

  12,867,467 acres of land in all, 344,532 in the State Responsibility Area and 2,093,631 in the Local. State zones are the ones the State Fire Marshal designated, in effect since April 1, 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

• Fire history

  The 10 largest of 1,048 fires that burned here

  Map
  1. 2003 Old Fire Cause: Arson 91,400 acres here
  2. 2023 York Fire 93,078 acres in total 84,494 acres here
  3. 2005 Wildhorse Fire Cause: Lightning 63,764 acres here
  4. 1999 Willow Fire Cause: Campfire 63,355 acres here
  5. 2006 Sawtooth Complex Cause: Lightning 61,763 acres here
  6. 1970 Bear Fire Cause: Campfire 51,651 acres here
  7. 2003 Grand Prix Fire Cause: Arson 50,614 acres here
  8. 2020 Dome Fire Cause: Lightning 44,209 acres here
  9. 2024 Line Fire 43,971 acres here
  10. 1970 Unnamed fire 37,472 acres in total · Cause: Miscellaneous 36,594 acres here

  And 1,038 smaller fires. The most recent was the 2025 Black Rock Fire, which burned 66 acres here. In all, 918,230 acres of San Bernardino 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