The park's serpentine soil is low in nutrients and high in magnesium, which restricts plant growth to species specifically adapted to these harsh conditions.
It is one of the few places in the world where the Bay checkerspot butterfly can complete its entire life cycle.
The preserve acts as a biological island, protecting plants that were once widespread across the Peninsula before urbanization.
Edgewood contains several 'serpentine barrens' where the soil chemistry is so extreme that almost no vegetation can survive, creating unique landscape patterns.
The park features a living laboratory for ongoing research into soil chemistry and its effect on native plant evolution.
The Old Stage Coach Road within the preserve was historically used by stagecoaches traveling between San Jose and San Francisco.
Edgewood Park & Natural Preserve is a 467-acre protected area in Redwood City known for its serpentine soil-based ecosystem. It contains one of the most significant remaining concentrations of serpentine grassland and wildflower meadows in the San Francisco Peninsula. The park features diverse habitats including oak woodlands, chaparral, and riparian corridors. Over 500 species of native plants, including rare varieties, have been documented within its borders. The preserve is a critical site for the federally endangered Bay checkerspot butterfly. It offers an extensive network of trails for hikers, equestrians, and birdwatchers. The serpentine soil prevents many invasive plant species from establishing, allowing rare native wildflowers to thrive. The park is managed by San Mateo County and prioritizes habitat restoration and conservation. Elevation gains on the trails provide panoramic views of the San Francisco Bay and the surrounding Santa Cruz Mountains.
The Serpentine Trail ridge during spring provides the most expansive views of the wildflower-blanketed meadows.
Bring plenty of water as the grassland trails offer minimal shade and can become very hot.
Stay strictly on marked trails to avoid damaging fragile, rare plant colonies that grow directly on the soil surface.
Visit during the spring months to see the peak wildflower bloom, which is widely considered the best in the region.
Do not visit during high heat alerts or peak summer afternoons, as the open grasslands provide little to no shade.
No dogs allowed on trails; stay on marked paths to protect rare serpentine plant species; no mountain biking.
