Haley Farm State Park is a publicly owned recreation area that preserves Colonial-era farmland as open space in the town of Groton, Connecticut. The site of the state park once formed part of the lands granted to Governor John Winthrop and later became a dairy farm. The park's 267 acres (108 ha) are connected to the adjacent Bluff Point Coastal Reserve by way of a pedestrian bridge over railroad tracks. Park activities are restricted to bicycling and walking. The park is managed by Connecticut Department of Energy and Environmental Protection.