Recent NCGS Field Trip Guidebooks are available for purchase for $20 plus the cost of shipping.  Please contact Phil Garbutt with purchase requests and inquiries.
Older NCGS Field Trip Guidebooks are available for free download here.

Guidebook Title
Geographic AreaYear
Author
Geologic Tour of the Devil's Slide Trail, San Mateo CountySan Francisco Peninsula2017Dr. Will Schweller
Field Guide to the Unique Geology/Geochemistry of  Ring Mountain Open Space Preserve, Marin County, CAMarin County2018 William E. Motzer, PhD and Mark Petrofsky
“A Fresh Look at the Geology of Mount Diablo’s Summit and Southwest Flank”East Bay2019Dr. Will Schweller and Dr. Don Medwedeff