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UC Cooperative Extension is located on the grounds of Elkus Ranch Environmental Education Center in Half Moon Bay, CA. Directions

Administration for all programs is conducted at this location and includes the following programs: 4-H, Urban Forestry, the Master Food Preserver and Master Gardener Programs and our Nutrition Education Staff.

Main Offices:
1500 Purisima Creek Road
Half Moon Bay, CA 94019
(650) 726-9059 cesanmateo@ucanr.edu

Currently, our Helpline Offices are closed but we are available to answer your questions via email or phone during our office hours!

UC Master Gardener Helpline: (650) 276-7430
Email:  mgsmsf@ucanr.edu

(3) locations.

  • Elkus Ranch Conference Center /  Mondays: 9am to 4pm
    1500 Purisima Creek Road
    Half Moon Bay, CA 94019
  • San Francisco Botanical Garden Library*  /  Wednesdays: 10:30 to 2pm
    1999 9th Avenue
    San Francisco, CA 94122
    *Do not bring any pest or disease samples to this SFBG location!
  • Veteran's Memorial Senior Center  /  Thursdays: 9am to 4pm
    1455 Madison Avenue
    Redwood City, CA 94061

4-H Club Information:

Please complete this information request form and a 4-H representative will contact you directly

Half Moon Bay Office Staff

Nutrition Office Staff

Elkus Ranch Staff