Gold Ridge Resource Conservation District

We inspire and partner with our community to protect the natural resources and agricultural future of our District.

Sudden Oak Death Blitz

Thursday, May 3:  Petaluma

Saturday, May 5:  Graton, Santa Rosa, Sonoma, Yorkville

Sunday, May 6:  Penngrove


Test your trees for Sudden Oak Death disease

At this one-hour meeting you will learn to:

  • Identify symptoms of SOD on bay laurel, oaks, and tanoak
  • Collect symptomatic leaves from bay laurel and tanoak to be analyzed at NO COST
  • Make important contributions to science

Unless otherwise noted, you collect leaves at locations of your choice and drop them back at the meeting site that weekend. We drive leaves to UC Berkeley Lab for analysis on Monday. You get results in late summer.

Learn about what is happening with your trees and your forest. Find out if SOD is present. Contribute data on current disease distribution. Click here for more about the SOD Blitz

Register online for one of these six meetings:

Thursday, May 3 at 5:30 pm

1) Petaluma Community Center

320 N. McDowell Blvd, Petaluma


Saturday, May 5 from 9:00 am – 1:00pm

2) Galbreath Preserve *collect samples during the event at the preserve

Meet at the Yorkville Post Office, 25400 CA-128, Yorkville

In conjunction with Sonoma State University; See registration page for restrictions


Saturday, May 5 at 9:30 am

3) Graton Community Club

8996 Graton Road, Graton

4) Spring Lake Park, Environmental Discovery Center

393 Violetti Road, Santa Rosa

Saturday, May 5 at 10:30 am

5) Sonoma Regional Library

755 W Napa St, Sonoma


Sunday, May 6 from 10:00am – 1:00pm

6) Fairfield Osborn Preserve – NEW location

*collect samples during the event at the preserve

Fairfield Osborn Preserve, Lichau Rd, Penngrove 94951

In conjunction with Sonoma State University; See registration page for restrictions


There is no cost for this activity. Hosted by the UC Master Gardener Program of Sonoma County SOD Specialists and the University of California Cooperative Extension, Sonoma County. Funding provided by the USDA Forest Service.