Coordinates: 37°53′41″N 122°14′30″W / 37.8946474°N 122.2416352°W / 37.8946474; -122.2416352
Tilden Regional Park, also known as Tilden /ˈtɪldən/, is a 2,079-acre (841 ha) regional park in the East Bay, part of the San Francisco Bay Area in California. It is between the Berkeley Hills and San Pablo Ridge.
Tilden Regional Park was named in honor of Charles Lee Tilden, a Bay Area attorney and businessman who purchased much of the land in order to preserve remaining wilderness areas for public enjoyment. Tilden also served on the first Board of Directors of the East Bay Regional Park District.
The park is managed by the East Bay Regional Park District, created from the first land the district purchased in 1936. It is largely located within unincorporated areas of Contra Costa County. An AC Transit bus from the Berkeley BART station runs into the park on weekends. Its steep valleys and dense stands of timber offer a rare wilderness experience so close to the city. Its high ridges and peaks give wide views over the San Francisco Bay and inland across other preserved land to Mount Diablo.