An improved picket railing anchor system for multiple picket railings for buildings, balconies, and decks, which can experience different forces being applied by people, objects or hurricane strength winds. The system includes an elongated base member having integral keyways which receive anchor assemblies having mounting plates, elevated rails and a central mounting post that also can elevate the base member to allow for drainage. The anchor assemblies are slidable and can be selectively positioned for easy and secure installation.