Gay City State Park is a public recreation area on the Blackledge River in the towns of Hebron and Bolton, Connecticut. The state park occupies 1,569 acres bordering Meshomasic State Forest and is accessible from State Route 85. In addition to its deep forest, millpond, and marshland, the park bears trace remnants of the mill town that occupied the site for most of the 19th century. The park is managed by the Connecticut Department of Energy and Environmental Protection.