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Contact Information
Denise Defreese
Project Manager
(510) 544-2344

Our long-range goal is to preserve and enhance the Serpentine Prairie so that future generations of East Bay residents can enjoy this Northern California treasure as a place to volunteer, study native plants or just enjoy the visual artist palette from the spring wildfowers. Future management strategies will include controlled sheep grazing, timed mowing to reduce specific species and continued monitoring to document the results of our management.

Serpentine Prairie Resource Management

The Skyline Serpentine Prairie in Redwood Regional Park is home to one of Northern California's richest arrays of native plants due to the serpentine rock found here. This small area is home to 17 species of California native grasses. Rare plants living in the prairie include the federal and state listed endangered species, Presidio clarkia, Clarkia franciscana and the CNPS 1B.2 rare plant Tiburon buckwheat, Eriogonum luteolum var.caninum. Extensive land use conversion and alteration has reduced the viable serpentine habitat in the East Bay hills. September 2009, the Park District began the first phase of a major restoration project that included removing non-native trees and building a protective fence around the most impacted portion of the prairie. In 2010 the remaining pines and hardwoods inside the main fenced protection area were removed. This restoration work and favorable climatic conditions have resulted in an increase in the Presidio clarkia population and impressive wildflower shows.

The timed mowing management strategy was expanded in early 2011 to reduce the non-native annual grasses, particularly the annual barley, Hordeum murinum and ryegrass, Festuca perennis. This resulted in a dramatic reduction of exotic annual grasses and expansion of the native annual forbs and perennial grasses. The next phase of the restoration program removed the remaining exotic pines and hardwoods below the Dunn Trail. Further tree removals occurred in 2013. Current ongoing activities on the Prairie include specifically timed spring mowing, hand removal of non-native tree sprouts and other weeds by staff and volunteers, targeted controlled sheep/goat grazing and extensive vegetation monitoring conducted by Creekside Center for Earth Observation.

Serpentine Prairie Restoration Project

Why Preserve the Prairie?

Prairie Plan

Guide to Wildflowers of the Prairie