Portola Valley

Summary

• Fire hazard severity zones

  Share of the land in each CAL FIRE hazard class

  Map
  1. High 3,840 acres · 25 state, 3,815 local 66%
  2. Moderate 1,947 acres · Local Responsibility Area 33%
  3. Non-wildland 27 acres · Local Responsibility Area <1%

  5,814 acres of land in all, 25 in the State Responsibility Area and 5,789 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

  Fires CAL FIRE has recorded here

  Map
  1. 1962 Leib Fire 1,328 acres in total 243 acres here

  In all, 243 acres of Portola Valley 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