Located three miles south of Coupeville, Wash., on Whidbey Island in Puget Sound in Island County.
From I-5 north:
Take the Anacortes/Whidbey Island exit (#230), and drive to the Whidbey Island turnoff. From there, proceed south on Hwy. 20 to Coupeville. Follow the signs to the Keystone Ferry terminal. The park entrance sign is between the ferry terminal parking lot and the Camp Casey barracks in the 25 MPH zone.
From the Mukilteo Ferry terminal at Clinton:
Take Hwy. 525 following signs to the Keystone Ferry terminal. Pass the Keystone Ferry parking lot, and take first entrance to the left.
From the south:
Follow signs to the Keystone Ferry terminal. Pass ferry parking lot, and take first entrance to the left.
To view campsites and facilities reservable at this park, visit the reservation system and campsite maps
Fort Casey downloadable pdf map #1
List of all downloadable Washington State Park maps