CNPS Yerba Buena Natural History Walks
Please note: Field trips participants must submit an online waiver
And special thanks to our dedicated field trip leaders!
Presidio Main Post
April 25, 2026 SATURDAY from 10am-noon
Leader: Lew Stringer
This walk will look at the Presidio’s use of native plants in the built landscape in a program we are calling ecological horticulture. The Presidio is dedicated to managing the historic landscapes of the Presidio while using more native plants. We will have the opportunity to see how sites are designed and maintained. Paid Parking at the meeting location
Lew Stringer is the Associate Director of Natural Resources at the Presidio Trust and will lead the walk.
Trip limited to 20 people.
Contact CNPS Yerba Buena email for registration and location: yerba.buena.cnps.chapter@gmail.com
Butterflies at Alemany Farm
Sunday May 3, 2026, 11:00am-1:30pm
Leader: Liam O’Brien
We’ll look for one of each of the five families of butterflies. Bring your enthusiasm for these winged beauties.
Mid-day we will take a break for light lunch (BYO) below the willow tree. Rain in the morning would cancel.
700 Alemany Blvd (closest BART is Glen Park, a 15-minute walk. Or served by MUNI 14 or 40 from Murray Street stop plus same 15-minute walk)
Sign this waiver to attend.
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San Bruno Mountain, Buckeye Canyon
Saturday, May 23,2026, 10am-2pm 
Leader: David Nelson
Buckeye Canyon offers a habitat quite different from most of San Bruno Mountain. Excessive rainfall in the November and December of 2022 set the stage for a tragedy. Then, on December 31, 2022 an atmospheric river dumped over six inches of rain in a continuous 12-hour period and caused a horrific landslide that changed the geology of the canyon from top to bottom. Now— 3 years later— the canyon is healing itself, and with some outstanding stewardship it is bending to mostly native species. We’ll conduct a bioblitz to assess the plants that have repopulated the erosion event. Along the way we will discuss the ecology of erosion events in a California Coastal climate and review of the science of erosion events as described by the USGS and other scientists.
Bring your cellphone with the i-Nat application loaded, and a lunch or snacks and water and sunscreen.
Contact David at nelsondl@pacbell.net to register and get directions to the meeting place
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Explore Edgewood with Kipp
Saturday, June 13,2026, 10am-1pm
Leader: Kipp McMichael
Hike the Serpentine hillside in search of wildflowers including possible Calochortus at Edgewood Park in Redwood City. Enjoy the views, the grasslands, oaks, and chaparral and the many native plants in this San Mateo’s only nature preserve.
There are butterflies, lizards and birds, and mammals that we may also see.
Meet in the parking lot at 10 Old Stagecoach Road, Redwood City
Please note: Field trips participants must submit an online waiver
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Upcoming field trips:
TBA