| Fort Casey Historical State Park | |
|---|---|
 Fort Casey disappearing gun | |
  Location in the state of Washington  Fort Casey (the United States) | |
| Location | 1280 Engle Road, Coupeville, Washington, United States |
| Coordinates | 48°09′51″N 122°40′44″W / 48.16417°N 122.67889°W[1] |
| Area | 999 acres (4.04 km2) |
| Elevation | 20 ft (6.1 m)[1] |
| Established | 1955 |
| Operator | Washington State Parks and Recreation Commission |
| Website | Fort Casey State Park |
Fort Casey State Park is located on Whidbey Island, in Island County, Washington state.[2] It is a Washington state park and a historic district within the U.S. Ebey's Landing National Historical Reserve.
Admiralty Inlet was considered so strategic to the defense of Puget Sound in the 1890s that three forts—Fort Casey on Whidbey Island, Fort Flagler on Marrowstone Island, and Fort Worden at Port Townsend—were built with the intention to create a "triangle of fire" against invading ships. This military strategy was based on the theory that the three fortresses would thwart any invasion attempt by sea.[3]
- ^ a b "Fort Casey". Geographic Names Information System. United States Geological Survey, United States Department of the Interior.
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