The site was once part of the estate of the inventor of the
comptometer Dorr E. Felt, whose summer home, the
Felt Mansion, built in 1928, is an in-holding within the
state park. Later on the mansion housed cloistered nuns. In the 1970s, the building was purchased by the state of Michigan and used as a state police post, with nearby buildings serving as a prison. The state completed purchasing the site for state park purposes in 1978. ==Activities and amenities==