Hoquiams Castle bed and breakfast, Olympic Peninsula, b and b. This 20 room mansion is a national historic site. Your Castle awaits you in Hoquiam, Washington, on the beautiful Olympic Peninsula. A Vibrant piece of west coast history has been preserved in Hoquiam's Castle. This 20-room mansion built in 1897 by lumber baron Robert Lytle has been declared a state and national historic site. Your Castle awaits you in Hoquiam, Washington, on the beautiful Olympic Peninsula.