Fort Casey State Park

1280 Engle Road
Coupeville, WA 98239


Close your eyes and imagine Fort Casey as it must have been 100 years ago, filled with eager young soldiers, officers, mechanics and staff. Stand at the Admiralty Head lighthouse or in a cliff-side gun battery and scan the horizon, as the enlisted men must have done during World War I and II.

Fort Casey, Fort Worden and Fort Flagler together were known as the "Triangle of Fire," a trio of strategically placed fortifications defending the entrance to the Puget Sound at the turn of the 20th Century.

Constructed in the late 1800s, Fort Casey was equipped for defense and used as a training facility up to the mid-1940s. The fort houses a pair of rare 10-inch disappearing guns. While the guns were the height of technology in the early 1900s, improvements in warships and the advent of airplanes soon rendered them obsolete. Two additional 3-inch mounted guns are also on display in their original emplacements. You can explore these batteries to your heart's content.

So round up your family, friends and history buffs, and step back in time to Fort Casey Historical State Park. From the romantic 1903-vintage lighthouse, with its own interpretive center and gift shop, to the catacomb-like bunkers and batteries, this historic military fort is sure to ignite curiosity.


Fort Casey Historical State Park is a 999-acre marine camping park with 10,810 feet of saltwater shoreline on Puget Sound (Admiralty Inlet); it includes Keystone Spit, a 2-mile stretch of land separating Admiralty Inlet and Crocket Lake.


Picnic area
Use our interactive ADA recreation map to search for other state parks with ADA amenities and facilities.

The park offers 68 unsheltered picnic tables. Picnic sites are first come, first served.


1.8 miles of hiking trails

Fishing (saltwater)
Watercraft launches (2)

Park store
Beach exploration
Bird watching
Two fire circles

Located in Island County on Puget Sound, Fort Casey has two saltwater watercraft launches.

Launching a boat at a state park requires one of the following:

An annual launch permit (Natural Investment Permit; or
An annual Discover Pass and a daily launch permit; or
A one-day Discover Pass and a daily launch permit.


The park offers 22 standard campsites, 13 partial-hookup sites with water and electricity, one restroom, and one shower. Utility sites are located in the inner circle campground (sites 26 - 35) and include four beachfront pull-through campsites (17 - 20). Maximum site length is 40-feet (limited availability). Campsites are located next to the Keystone Ferry terminal.

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