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Edgewood Quick Facts

Size 467 acres
Location Intersection of Highway 280 and Edgewood Road in Redwood City
Elevation 240’ to 873’ above mean sea level
Geology Significant (160 acres) concentrations of serpentinite (California’s state rock) plus sandstone, shale, chert, greenstone, and other minerals
  • 78 families
  • 9 communities (non-native grassland, serpentine bunchgrass grassland, chaparral, mixed serpentine chaparral, chamise chaparral, mixed Northern California coastal scrub, oak foothill woodland, mixed hardwood subgroup of the mixed evergreen forest community, and wetlands)
  • about 500 species (unusually high diversity)
  • Mammals (deer, coyote, fox, bobcat, etc.)
  • Birds (more than 80 species, including vultures, quails, owls, hummingbirds, woodpeckers, and flycatchers)
  • Amphibians and reptiles (California slender salamander, Western toad, Pacific tree frog, northern alligator lizard, western fence lizard, gopher snake, western garter snake, kingsnake, Western skink, etc.)
  • Invertebrates (wasps, bees, ants, butterflies, moths, beetles, spiders, and arachnids)
Federal and State Protected Species
  • Bay checkerspot butterfly (Euphydryas editha bayensis) (threatened)
  • San Mateo thornmint (Acanthomintha duttonii) (endangered)
  • Marin western flax (Hesperolinon congestum) (threatened)
  • White-rayed pentachaeta (Pentachaeta bellidiflora) (endangered)
Other Species of Concern
  • Kings Mountain manzanita (Arctostaphylos regismontana)
  • San Francisco collinsia (Collinsia multicolor)
  • Western leatherwood (Dirca occidentalis)
  • Fragrant fritillary (Fritillaria liliacea)
  • Woolly-headed lessingia (Lessingia hololeuca)
  • Serpentine linanthus (Leptosiphon ambiguus)
  • Arcuate bush mallow (Malacothamnus arcuatus)
  • Blind harvestman spider (Calicina minor)
  • Edgewood microblind harvestman (Microcina edgewoodensis)
Other Distinctions
  • Only natural preserve in San Mateo County (Fitzgerald is a marine reserve)
  • Spectacular springtime wildflower displays
  • Excellent representation of California’s native plant species (which have adapted to the harsh soil conditions)
Current Status
  • Natural Preserve (since 1993)
  • Primary management objective is to protect, preserve, and restore Edgewood’s natural resources
  • Hiking, horse riding, nature studying and appreciation
  • Picnicking and day camping at Old Stage Day Camp