Duxbury Reef State Marine Conservation Area (SMCA) is a marine protected area located about 1 mile (2 km) west of Bolinas in Marin County on California’s north central coast. This marine protected area covers 0.66 square miles (1.7 km2). Duxbury Reef SMCA prohibits the take of all living marine resources, except the recreational take of finfish from shore only and the recreational take of abalone.