Field Trips

CNPS- Yerba Buena Natural History Walks:

Woo-hooooo! Field trips are back! With county level health guidance restrictions naturally...

At the time of writing this announcement, we are unclear of the public health guidelines for these future dates. YB-CNPS adheres to the state and county public health guidelines (ex: group size, whether food can be consumed, masks and social distancing).  Currently things are looking good and we hope that conditions continue to improve. 

Please note: Statewide CNPS is requiring signed waivers from event participants.

Please complete the linked waiver for each field trip you will be attending. A paper version will be made available on site - signing is required to attend a field trip.

And special thanks to our dedicated field trip leaders!

Upcoming Field Trips 2022


August 13, 2022 SATURDAY from 9.30 am to noon

Explore Mount Davidson

Field Trip Leaders: Jake Sigg and Ruth Gravanis

Sign this waiver in advance to attend

Trip limited to 12 people.  Email  by August 10 to reserve your spot, we will confirm space and send you a waiver.

We enter the eucalyptus plantation, emerging onto remnant native grassland/wildflower area.

We’ll contour around the mountain, discussing the value of preserving these pieces of the original landscape, and through a rich and delightful patch of huckleberry with two species of large bunchgrasses: California fescue and Nootka reed grass.

Then we reenter the plantation, discussing management of the understory to increase its habitat value and see some of our cultural heritage in the stairways constructed of indigenous radiolarian chert by the Works Progress Administration in the 1930s.


August 18, 2022 THURSDAY, 4:30 pm-7pm

San Francisco Botanical Garden

Leader: Paul Bouscal, CNPS Board member and California Naturalist

Sign this waiver in advance to attend.

Take a summer hike in the San Francisco Botanical Garden’s California section to see a variety of California native species and the insects and wildlife that are attracted. In summer it may be foggy and/or windy, layers of clothing are recommended. Bring your reusable water bottle to stay hydrated. Please note there is a non-resident fee to enter the SFBG.  Meet at the 9th Avenue gate. Limit 20 attendees.

Contact Paul at, or call 650-438-9109 if you have questions.


August 20, 2022 SATURDAY, 10am-1pm

San Bruno Mountain, Saddle and Bog Trails

Leader: Doug Allshouse

Sign this waiver in advance to attend.

These two trails are the most popular trails in the park and are easy on the legs. They are surprisingly rich in plant species, both native and non-native, and offer views from the Marin Headlands to San Jose on clear days. This time of year the saddle features the late summer and fall yellows of three golden rods and gumplant, snowy shades of pearly everlasting and my favorite, pink everlasting. My field trips are not limited to plants because there is so much else to see. If you’re a birder bring your binoculars and look for hawks, kites and kestrels or maybe a phoebe. Bring a light lunch or a snack and we can stop at the day camp or debrief at the picnic grounds after our walk. It’s always wise to bring layers because it’s Fogust and weather can be cold and foggy to sunny and warm or somewhere in between. There is a $6 entry fee payable at the ranger kiosk. Meet in the main parking lot. This field trip is limited to 20 people. Contact Doug at to sign up for this trip and meeting instructions.