San Juan Islands National Historical Park preserves sites from the 19th-century territorial dispute between the United States and Britain, offering visitors scenic island landscapes and rich maritime history.
San Juan Islands National Historical Park is a collection of separate sites spread across several islands in the northern Puget Sound region of Washington State. The park protects and interprets areas related to the mid-1800s Pig War border dispute between the United States and Great Britain, which was resolved without military conflict. These sites encompass both natural coastal environments and cultural landmarks, including historic military buildings and old farms. The park's islands feature rocky shorelines, forested uplands, and diverse marine habitats that provide excellent opportunities for wildlife observation, including seals, sea birds, and occasionally orcas. Unlike traditional parks, this National Historical Park is non-contiguous, with units on San Juan Island, Lopez Island, and parts of other nearby islands. Visitors can explore old military installations such as the English Camp and American Camp, hike several trails that range from easy shoreline strolls to moderate forest treks, and enjoy beachcombing along saltwater shores. Kayaking and boating are popular for accessing some areas only reachable from the water. The park's blend of natural beauty and historical significance appeals to those interested in Pacific Northwest history, coastal ecosystems, and quiet island adventure. The best visits combine hiking, wildlife viewing, and exploring historical sites linked to the 19th-century international boundary dispute, offering educational and outdoor recreation experiences.
English Camp on San Juan Island, a historic British military outpost
American Camp with its preserved military buildings and views of Boundary Pass
Rare coastal marine ecosystems supporting seals, sea birds, and intertidal life
Kayaking routes along protected shorelines with opportunities for marine wildlife sightings
A well-preserved British military post with historic buildings and interpretive exhibits about the Pig War conflict.
The U.S. military fortification site featuring walking trails with panoramic views and remnants of historic structures.
A tidal shoreline area with beach access, offering opportunities for tidepool exploration and bird watching.