Looking to enjoy hiking, biking, picnicking, horseback riding, camping, fishing, golfing, boating and nature ? Visit any of the East Bay Reginal Parks! The East Bay Regional Park District is a system of beautiful parklands and trails in Alameda and Contra Costa counties east of San Francisco. The system comprises 119,000 acres in 65 parks, including over 1,250 miles of trails. Click here for a list of all East Bay Regional Parks, plan your visit & more info!