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Map Satellite Extending from San Pablo Bay to the ridge of the San Pedro Peninsula, this is the only remaining major natural transect from the water to mountains (hills) in the San Francisco Bay Area. Several communities or habitats are present.
On the edge of San Pablo Bay is a mudflat with various algae species. Slightly higher is a salt marsh, with pickleweed, Salicornia virginica, the dominant. Inland there is a small freshwater marsh that dries out on occasion.
Higher, in the canyon bottom, is a redwood forest with Sequoia sempervirens and tan-oak, Lithocarpus densiflorus. On the canyon slopes above the redwoods, and occupying much of the area, there is a mixed broadleaf evergreen forest with live oak, Quercus agrifolia, madrone, Arbutus menziesii, and California bay, Umbellularia californica. Some grassland and chaparral are also present.
Animal life is abundant and reflects the diversity of the communities present.
Integrity: There are power lines and a road in the area; however, the area is reasonably undisturbed.
Use: Research, educational, observational. Some private.
February 1978
Inventory of California Natural Areas
Revision © 2008 Steven Louis Hartman
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