The 618-acre (250 ha) state park features twelve historic wood-frame buildings from the fort complex as well as an interpretive center and hiking trails.

[3] Fort Columbia was declared surplus at the end of World War II and was transferred to the custody of the state of Washington in 1950.

In 1993, the park received a pair of 6-inch guns that were transferred to Battery 246 from the former Fort McAndrew, Naval Station Argentia, Newfoundland, Canada.

The Commanding Officers Quarters is decorated with turn-of-the-century furnishings.

There are picnicking facilities and 5 miles (8.0 km) of hiking trails that work their way up Scarborough Hill.