The Sailing Ship Balclutha, a 1,689 ton, three-masted, steel-hulled, square-rigged ship, is located in San Francisco Maritime National Historical Park in San Francisco, California. The Balclutha played an active role in the development of maritime trade and commerce in the United States including the grain trade between California and England, the Pacific Coast lumber trade, and the Alaskan salmon trade. With the exception of several name changes and a few alterations made during the course of her long career she is essentially the same vessel that was launched in the 1880s. The Balclutha is the last square-rigged vessel afloat on San Francisco Bay and is one of only two American-owned square riggers afloat on the West Coast.