From the record
“Tatoosh Island is a small island and small group of islands about 0.5 miles (0.8 km) offshore (northwest) of Cape Flattery, which is on the northwestern tip of the Olympic Peninsula in Washington. Tatoosh is the largest of a small group of islands also often referred to as simply "Tatoosh Island", which are almost as far west as Cape Alava, which is about 15 miles (24 km) to the south and the westernmost point in the contiguous 48 states.”
Wikipedia article Tatoosh Island, Washington, CC BY-SA 4.0.
One of 43 National Register listings published here for Clallam County · listed in 1972 · category: Building.
Sources: the Wikipedia article · the case file at the National Archives · the National Register database, National Park Service · the Wikipedia article