Geology of Northern Point Reyes Beaches

Geology of Northern Point Reyes Beaches

Fri, April 12
Learn about unique local geology, tectonics, climate cycles, and coastal processes as you hike and explore scenic Point Reyes beaches!

Discover the geology of northern Point Reyes on two hikes (in one day) at Kehoe and McClures Beaches. Learn about the geologic histories of the older igneous and metamorphic rocks as well as the younger sedimentary rocks in the rugged cliff exposures. These rocks have been displaced to the Bay Area on the Pacific Plate by movement along the San Andreas Fault.

Learn also about ice age climate cycles, sea-level changes, and coastal processes as you explore these beautiful beaches and make sense of this geologically unique coastline!

John Karachewski has conducted geology and environmental projects from Colorado to Alaska to Midway Island and throughout California, and has led over 50 geology hikes for PRNSA. Doris Sloan and John collaborated on a popular book “Geology of the San Francisco Bay Region.” John enjoys biking, hiking, and photographing landscapes.

Photo Credit: Bill Helsel, used with permission


-We will be meeting at the Kehoe Beach Trailhead

– Please arrive 10-15 minutes early to check in

– Refunds available for all classes 7 days in advance of the start date, after 7 days and before 2 days, participants can credit their class for a future date. All requests before 48 hours in advance will be declined. For COVID policy, see below.

– Please follow the parking instructions for the facility used that day

– Please provide an email you check regularly for updates and reminders about your class

– Registration is required online prior to the event in order to maintain class sizes

– Sales end 48 hours before the start date.

– Waitlists are available when the class sells out

What to Bring

Trekking Poles, if desired (Optional)

Day Pack


Warm Variable Weather Clothing

Hiking Shoes

Water Bottle

Notebook and Pen/Field Journal

Eventbrite Confirmation Email

Binoculars (Optional)

Camera (Optional)

About the PRNSA Field Institute

The PRNSA Field Institute offers hands-on environmental education classes throughout the year that foster enjoyment of Point Reyes National Seashore. Our classes are led by expert instructors, who take you out of your everyday life and into the natural world. We host a variety of classes about the arts and sciences and have something for everyone. You can reach the Field Institute at (415) 663-1200 x304 or by email at

Interested in becoming a member of PRNSA? Click Here!

Interested in becoming a PRNSA Field Institute volunteer facilitator, or are you an outdoor educator or artist who would like to teach a PRNSA Field Institute class? Send an Email!

For any questions, please email us at

COVID-19 Field Institute Guidelines

Please respect the following COVID-19 procedures:

· Perform a health self-check before coming to class using the CDC Symptoms of Coronavirus as a guide

· Do not attend class if you are experiencing COVID symptoms, know that you have had a close exposure, or are suffering from any flu-like or respiratory illness

· Contact the Field Institute if you will not be able to attend due to COVID. You may be eligible to receive a full or partial refund

· Participants exhibiting signs of respiratory illness may be asked to leave class

· Masks are optional at your discretion

· Please bring your own food and water

All guidelines are subject to change pursuant to State or County Health order updates.

Thank you for your cooperation in following these guidelines to help keep everyone safe.