• American Camp parade ground looking west

    San Juan Island

    National Historical Park Washington

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  • English Camp Visitor Contact Station on Winter Schedule

    The English Camp visitor contact station in the Royal Marine Barracks is closed for the season, starting September 2. Grounds are open daily from dawn to 11 p.m.

  • American Camp Visitor Center on Winter Schedule

    The American Camp visitor center is open 8:30 a.m. to 5 p.m. daily from September 2 to June 6, 2015. Grounds remain open daily from dawn to 11 p.m. Telephone 360-378-2240, ext. 2227 or 2226 for information. More »


The Columbian blacktail deer (odocoileus hemionus columbianus) is the largest land mammal in the San Juan Islands.
Mandy Lee Photo

Because of environmental and topographical contrasts on San Juan Island, you’ll find a surprising variety of wildlife here: Large marine mammals such as Orca whales, Dall’s porpoises and Pacific Harbor seals; terrestrial mammals such as red fox and Columbia blacktail deer; bats; reptiles; amphibians; more than 200 species of birds; 32 species of butterflies; 200 species of fish; and hundreds of species of marine invertebrates. Many species reside at San Juan Island NHP or in its surrounding waters year around, some are summer or winter residents, and others visit the island to rest and feed during seasonal migrations.

Island biogeography explains why there are fewer species of animals on San Juan Island than on the neighboring mainland: they must find a way to cross seven to 20-miles stretches of open water or vast expanses of open sky.

Not all animal species are native. Some, such as the red fox, European rabbit, and Norway rat, were introduced to the island by humans, which changed the island’s natural balance. The future of all these species is intricately tied to the environmental health of the land, water, and air of San Juan Island National Historical Park, the Straits of Juan de Fuca, Georgia, Haro, and beyond.

Did You Know?

Mt. Finlayson on San Juan Island.

Mt. Finlayson is named for Roderick Finlayson, a Hudson's Bay Company employee who is credited with founding Victoria, BC. He is one of several Company men who have island roads and features named for them.