Grand Prix Fire

Wildfire in San Bernardino County, October 2003

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Printed October 28, 2026 from www.firezones.info/fire/5988/grand-prix-fire-2003

Key facts

Started October 21, 2003
Contained November 14, 2003, after 24 days
Burned 50,618 acres
6th largest fire of 2003
Cause Arson
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Where it burned

Counties

  1. San Bernardino County 50,614 acres
  2. Los Angeles County 2 acres

Communities

  1. Rancho Cucamonga 6,674 acres
  2. Lytle Creek 2,855 acres
  3. Fontana 944 acres
  4. San Antonio Heights 767 acres
  5. Rialto 635 acres
  6. San Bernardino 577 acres
  7. Upland 180 acres
  8. Claremont 2 acres

Acres are the land the fire burned in each county and community, and places where it burned less than an acre are not listed. Communities are cities, towns and the unincorporated places the Census Bureau names, so land outside any of them is counted only in its county.

The same land, other fires

Burned before

  1. 1913 Unnamed fire 3,086 acres shared
  2. 1921 Unnamed fire 1,522 acres shared
  3. 1921 Unnamed fire 1,054 acres shared
  4. 1925 Unnamed fire 1,185 acres in total 958 acres shared
  5. 1936 Unnamed fire 4,702 acres shared
  6. 1949 Unnamed fire 7,024 acres in total 2,320 acres shared
  7. 1953 Unnamed fire 2,258 acres in total 1,787 acres shared
  8. 1953 Barrett Fire 6,868 acres in total 941 acres shared
  9. 1957 Morse Fire 2,473 acres shared
  10. 1957 Verdemont Fire 1,629 acres in total 1,019 acres shared
  11. 1968 Middle Fork Fire 6,468 acres in total 1,972 acres shared
  12. 1970 Unnamed fire 37,472 acres in total · Cause: Miscellaneous 31,836 acres shared
  13. 1970 Unnamed fire 2,955 acres in total · Cause: Campfire 1,638 acres shared
  14. 1973 Sycamore Fire 1,655 acres in total 1,051 acres shared
  15. 1975 Unnamed fire 1,455 acres in total · Cause: Equipment use 1,435 acres shared
  16. 1980 Summit Fire 4,368 acres in total 3,816 acres shared
  17. 1988 Unnamed fire 5,244 acres in total 4,074 acres shared
  18. 1988 Unnamed fire 4,358 acres in total 3,996 acres shared
  19. 1988 Texas Fire 12,096 acres in total · Cause: Arson 10,118 acres shared

Burned again

  1. 2014 Etiwanda Fire Cause: Miscellaneous 2,134 acres shared

And 117 more fires that burned less of the same land. Acres are the land each fire shares with the Grand Prix Fire, and fires that shared 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 history
CAL FIRE Fire and Resource Assessment Program
Published 28 July 2026
Building damage
CAL FIRE Damage Inspection
Updated 19 October 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