Tillamook Rock Light is a deactivated lighthouse on the Oregon Coast of the United States. It is located approximately 1.2 miles (1.9 km) offshore from Tillamook Head, and 20 miles (32 km) south of the Columbia River, situated on less than an acre of basalt rock in the Pacific Ocean. The construction of the lighthouse was commissioned in 1878 by the United States Congress, and began in 1880. The construction took more than 500 days to finish, with its completion in January 1881 - Wikipedia