Field Trips

CNPS- Yerba Buena Natural History Walks:

We have a bountiful bevy of entertaining and informative walks coming in 2019!

All are welcome (some trips you need to register for but most you don't). We're out there...get out there with us!


June 8, SATURDAY, 10am-Noon

The Daly City Dunes, San Bruno Mountain

Leader: Doug Allshouse

Imagine a 300-foot deep sand dune system that dates back about 125,000 years when San Bruno Mountain was almost an island, and it’s 2 miles from the ocean! Located at the mouth of lower Colma Canyon, the dunes are a remnant of the Ancient Colma Dune Formation that once stretched from Colma to the Presidio, but now is fragmented by development in western San Francisco and Daly City. A piece of this site is relatively intact and supports a specific ecosystem not usually found at such a distance from the coast. Of great interest is the presence of San Francisco lessingia (Lessingia germanorum) an endangered dune plant now found only in the Presidio and the Dunes, its only known population in San Mateo County. Also present at the dunes is San Francisco spineflower (Chorizanthe cuspidata), dune suncup (Camissonia strigulosa), contorted suncup (Camissonia contorta), miniature suncup (Camissoniopsis micrantha), California suncup (Camissoniopsis bistorta), and blue beach lupine (Lupinus chamissonis). There should be a great bloom of farewell-to-spring (Clarkia rubicunda) on the backside and a population of California pipe vine nearby (Aristolochia californica), which means the sighting of beautiful Pipe Vine Swallowtails (Batus philenor) and their larvae is a distinct possibility. Wear sturdy shoes suitable for sand. Thiers Street intersects Hillside Boulevard about halfway between the Mission Street/John Daly Blvd intersection and East Market Street. Turn onto Thiers Street and meet at the Hilldale School at the junction of Thiers and Florence Streets.

Contact Doug at, text or call 415-269-9967 if you have questions or need directions.



June 22, SATURDAY, 10am-Noon

Native Plant Gardens of the Baker Beach Apartments

Leader: Lewis Stringer

Can coastal native landscaping provide aesthetic beauty for residents while providing ecological benefits for wildlife? Join Presidio Trust restoration ecologist Lewis Stringer on a walking tour of the former military housing complex that is enveloped with a diverse community of central coast dune scrub plants. Throughout the hike, restoration goals, techniques, and the site’s history will be discussed. The hike should take approximately 2 hours or less and will involve some slightly hilly terrain.  We will begin near 1599 Pershing Drive where street parking is available. The area is also accessible via the Muni #29 bus.


July 14, SUNDAY 8am- 10am

Field Trip: Late Bloomers and Birds of Devil’s Slide (RSVP required)

Leaders: Eddie Bartley, Bob Hall
Join CNPS Yerba Buena board members on a foggy walk to see one of the most dramatic stretches of coast anywhere. Devil’s Slide Trail in Pacifica is a 2.6-mile out-and-back walk along a former segment of Highway 1 that offers flora and fauna such as Wight’s paintbrush, coast angelica, peregrine falcon and rock wren (Plant list from Pedro Point Headlands: ). We will meet in the SOUTH parking lot on the Montara side. Parking is extremely difficult. Car-pooling is advised. At this time, the only public transportation service available is provided by SamTrans, Route 17 on Highway 1.
This trip will be limited to 20 people. RSVP at