ZIP code 91701

San Bernardino County, including Rancho Cucamonga

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Report created October 31, 2026 at www.firezones.org/zip/91701

Summary

  • Fire hazard severity zones

    Share of the land in each CAL FIRE hazard class

    1. Very High 721 acres · Local Responsibility Area 15%
    2. High 186 acres · Local Responsibility Area 4%
    3. Moderate 147 acres · Local Responsibility Area 3%
    4. Non-wildland 3,684 acres · Local Responsibility Area 78%

    4,737 acres of land in all, 4,737 of it in the Local Responsibility Area. 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

    Fires CAL FIRE has recorded here

    1. 1970 Unnamed fire 37,472 acres in total · Cause: Miscellaneous 296 acres here
    2. 2003 Grand Prix Fire 50,618 acres in total · Cause: Arson 286 acres here
    3. 1945 Unnamed fire 418 acres in total 185 acres here
    4. 1970 Fpd #92 (Al) Fire 500 acres in total 129 acres here
    5. 1944 Unnamed fire 171 acres in total 77 acres here
    6. 1923 Unnamed fire 58 acres here
    7. 1923 Lewis Canyon Fire 48 acres in total 42 acres here
    8. 1911 Unnamed fire 40 acres here
    9. 1976 Unnamed fire 88 acres in total 37 acres here
    10. 1994 Unnamed fire 127 acres in total · Cause: Miscellaneous 3 acres here

    The most recent was the 2003 Grand Prix Fire, which burned 286 acres here. In all, 960 acres of ZIP code 91701 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

Nearby areas

Communities in ZIP code 91701

Neighboring ZIP codes

  1. 91701 15% Very High · this area
  2. 91730 No hazard zones
  3. 91737 57% Very High
  4. 91739 36% Very High
  5. 91784 25% Very High
  6. 91786 2% High
  7. 92358 7% Very High

Sources

Fire hazard severity zones
CAL FIRE Office of the State Fire Marshal
State map published June 27, 2025, local map February 2, 2026
Fire history
CAL FIRE Fire and Resource Assessment Program
Published July 28, 2026

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