3. Geology

Study the geology and the watershed at Santa Ysabel East Preserve. 

Saturday, November 11, 2022

9:00 am - 4 pm

Expert: Mike Thacker

Maps: Google Map for this ESP session

The ESP Café is closed today. Consider stopping at Dudley's Bakery for coffee, breakfast and any lunch items. 

Recommended Reading: 

SAN DIEGO: An Introduction to the Region by Philip R. Pryde

• Chapter 2: Building the Region: The Geologic Forces that Shape San Diego County.

• Chapter 6: Gifts from an Arid Land: Natural Resources of San Diego County.

• Chapter 8: The Most Essential Resource: A Secure Water Supply for the County.

COAST TO CREST AND BEYOND: Across San Diego County by car along the San Dieguito River by Wolf Berger, Ph.D.

• Chapter 5: Clevenger Canyon to Santa Ysabel: Pages 95 - 100.

• Appendix I: Geologic Time Scale

• Appendix II: Nature Notes by Karen Berger: Pages 136 - 137. 

We will meet at the Santa Ysabel Nature Center (Address: 22135 CA-79, Santa Ysabel, CA 92070)

Please be at the Nature Center no later than 9 AM (restrooms are available there). Mike Thacker will then give a geology presentation. From there it is an 8.5 mile drive to the Santa Ysabel East Preserve parking area, where we will begin an easy 1.5 mile hike through an impressive riparian area, with massive oaks and sycamore trees.  We will lunch and have our reflection time along Santa Ysabel Creek.  There will then be an optional and additional 4 mile hike and 560 foot elevation gain to the Kanaka Grasslands. Loop Trail.  We will return by the same route.

In case of rain several days before our hike, there is a possibility that the Preserve will be closed and we will need to make alternate arrangements.

View Geology in a larger map