Fort Ebey was built on Partridge Point in 1942 as a World War II coastal defense near the mouth of Puget Sound. The fort was named for Isaac Neff Ebey, a pioneering homesteader on Whidbey Island. The fort included a battery of two 6-inch guns that were later cut up for scrap.
Set on the western side of Whidbey Island, Fort Ebey's battery was dug into a high bluff. The park's concrete gun emplacements and underground rooms are great for exploration.