Nature in the Heart of Silicon Valley: Pearson-Arastradero Preserve

Palo Alto, Ca – The Pearson-Arastradero Preserve offers grassy hills and miles of trails for hiking and dog walking, right in the heart of the Silicon Valley.

Species to Look Out For

About the Park

Palo Alto, Ca – Open Space

Science Spotlight: Restoring Native Californian Grasslands & Oak Habitat

With the settlement of the Spanish came the introduction of non-native grasses to the Bay Area. These non-native grasses, lacking natural predators in their introduced environments, were able to spread rapidly and out-compete native grasses and wildflowers. As a result, 90% of the native habitat has been lost to foreign invaders.

Native oak habitats have also suffered. Spanish settlers cleared large oaks to make the land available for cattle grazing, and the livestock in turn ate many of the oak saplings and acorns. This, along with depleted soil moisture from non-native plants, has contributed to the loss of much of the oak habitat.

Today, local organizations work with Pearson-Arastradero to restore the habitats that were lost. For more information on how you can get involved, check out the Grassroots Ecology volunteer page or the California Native Plant Society volunteer page.

Park History

The area that is now Pearson-Arastradero was once a working ranch. In 1976, the Palo Alto City Council purchased the land to protect it from developers. They have been acquiring more land for the preserve since, and it now has a total of 622 acres.

Visit the Park

Please note that there is no entrance fee to enter the park. Dogs are allowed on leashes.

When visiting, we recommend taking the Juan Bautista de Anza trail down to see Arastradero Lake. There, you can find a great assortment of waterfowl, song sparrows, and the occasional black phoebe. When walking along the grassy trails, be on the lookout for American kestrels, western bluebirds and lesser/American goldfinches.

Here are some helpful resources to help plan your visit:



Author: Taylor Crisologo

Taylor studied biology at Cornell University, where she worked with the Cornell Lab of Ornithology on projects ranging from breeding herring gulls off the coast of Maine to dancing lyrebirds in Australia’s Blue Mountains. When she’s not researching great places to experience Bay Area nature, you can find her birding or reading a book at home with her husband and their two indoor cats (Max and Penelope).

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