The county park and preserve together cover more than 2,400 acres with over 25 miles of trail, managed by the Midpeninsula Regional Open Space District. The land was granted as Rancho San Antonio in 1839. A hill between Permanente and Stevens creeks is known as De Anza’s Knoll, where the explorer first spotted the Bay.
The state’s tallest California bay laurel grows in the county park, and a four-mile trail climbs to the 2,800-foot top of Black Mountain.