April 28, 2019 from 9:00am to 12:00pm 

Sudden Oak Death Blitz

Help control this destructive forest pathogen! Now in its 12th year, this statewide citizen science project is vital to managing Sudden Oak Death, which is widespread in Sonoma county. Join us for an exciting day hiking the preserve, contributing to science, and even getting your own bay laurel or tanoak trees tested at no cost.


A canker on the inner bark of tanoak
A canker on the inner bark of tanoak
Photo by Dmitry Mozzherin
Photo by Dmitry Mozzherin

January 21, 2019 from 9:30am to 2:00pm 

Christmas Bird Count for Kids

Join us for Osborn Preserve’s inaugural CBC4K, a junior version of the Audubon Christmas Bird Count in its 118th year. Kids will learn from experts while contributing to the North American ornithology databases maintained by Cornell Lab.

Photo by Minette Layne
Photo by Minette Layne

December 15, 2018 from 9:00am to 12:00pm 

Habitat Restoration

We will be helping the Laguna de Santa Rosa Foundation to restore essential habitat. This is an event for all ages. No training or previous experience is required. The Laguna foundation will be providing tools and snacks. Please be sure to bring water. 


October 20, 2018 from 10:00am to 1:00pm 

Armstrong Redwoods

We will be visiting Armstrong Redwoods State Natural Reserve, in Guerneville. Come to learn about these towering redwoods (some are more than 350 feet tall and 12-16 feet wide), the history of this land, its ecology and the surrounding ecosystem. 


September 15, 2018 from 10:00am to 1:00pm 

Beach Cleanup

Help us to keep our oceans free of trash. Learn about plastic pollution and the effects that it has not only on sea animals, but on ourselves! Plus learn how your actions make a difference.