Vasco Caves Regional Preserve exists because of the combined efforts of the East Bay Regional Park District and the Contra Costa Water District.
Next to Las Trampas on Bollinger Canyon Road is 100-acre Little Hills Ranch
A 550-foot pier provides access to great fishing in the San Joaquin River at Antioch/Oakley Regional Shoreline, located just upstream from Highway 160's Nejedly Bridge in Antioch.
Bishop Ranch Open Space Regional Preserve offers quiet and solitude on 806 acres just a short distance from San Ramon Valley subdivisions.
Bring drinking water when you visit the 1,979-acre Preserve; no drinking water is available.
With its rolling, grassy hills and secluded, shady canyons, Briones is a secret wilderness surrounded by the towns of central Contra Costa County.
Bay Point Regional Shoreline provides access to undeveloped open space and marsh habitat in an area surrounded by residential, military, and industrial development.
Big Break Regional Shoreline is a part of the great 1150-square-mile Sacramento-San Joaquin River Delta.
Located at the junction of the Sacramento and San Joaquin rivers, this 595-acre island in the Sacramento Delta north of Pittsburg is the home of six rare and endangered plant species, and a variety of aquatic birds.