Boyd Real Estate, Boyd, Bethel Island, CA,Residential real estate and commercial recreational property for sale in Bethel Island, Brentwood, Byron, Discovery Bay, Knightsen, Oakley, Far East Contra Costa County, California. Waterfront Homes, Vacation Property, 2nd Homes, Boat Harbors, Marinas with Campgrounds and Commercial Investment Property on Bethel Island, California, the Heart of the Sacramento-San Joaquin River Delta. Also mobile homes, condominiums, horse property, agricultural land with development potential. Search the MLS for active, pending and sold listings.