Sonoma Mountain Geology Walk

Sonoma Mountain is a part of a tectonic boundary we call The San Andreas. Deep Earth forces have uplifted the mountains & valleys of Sonoma County out of the ocean over millions of years, caused volcanic eruptions, and created topography at the intersection of countless faults. The land exists in its current form because of earthquakes, streams, landslides, fires, and human influence. Join Nicole Myers, lecturer at Sonoma State University, for a journey through geologic time and history in Sonoma County. We will observe how geology and climate have created the landscape features of Fairfield Osborn Preserve.


Nicole Myers, M.S. in Geological Sciences, developed a passion for understanding the Earth from a childhood fascination with rocks and volcanoes, and now teaches others to appreciate planet Earth. Nicole has been teaching earth science classes, including geology, climatology, & earth history for more than 18 years. She currently teaches at Sonoma State University, and through Appreciating Earth, Nicole brings her enthusiasm to the community by offering earth science field explorations and presentations.


The maximum hike will be 2.5 miles with a 300-foot elevation gain, adaptable to participant abilities.

Fairfield Osborn Preserve is a 15-minute drive from Sonoma State's main campus, on Lichau Road in Penngrove. Parking is limited so please consider carpooling. 

Participants must sign a waiver upon arrival. All minors must be accompanied by a legal guardian. Pets and smoking are not permitted. This is a rain or shine event. No previous experience or knowledge is required to participate. 

COVID-19 Safety

Do not attend if you test positive for COVID-19 or if you have any symptoms that may be indicative of COVID-19. All SSU updated guidelines can be found here.

What to Bring

Please bring rain, sun and insect protection as needed, a full water bottle and snack, book/paper for notetaking, and sturdy footwear for hiking. Long pants are recommended.

A sink for handwashing, potable water and restrooms are available on site.

How to Sign Up

See registration link below. Each person should register separately. This event is free of charge.

About the Center

Sonoma State University’s Center for Environmental Inquiry empowers university students to work with community members on the environmental challenges of the North Bay. Our mission is to create an engaged and environmentally ready society, one where all people have the skills to find solutions to the challenges facing our earth. SSU Preserves are open to everyone engaged in education or research. Reservations are required.

Fairfield Osborn Preserve
Admission Fees
Contact Email
Contact Phone
Contact Name
Kerry Wininger
Date & Time Registration Link
Saturday, April, 13, 2024, 2:30pm to 5:30pm