(Chatfield Hollow State Park, 30', 1966, 07-04-e) across Chatfield Hollow Brook in Chatfield Hollow State Park NW of Killingworth, Killingworth Township, Middlesex County, CT. CT80 W. 1.1 miles from jct with CT81 in Killingworth, N. into the park & follow park Rd. 1.1 miles N. to the bridge. Admission. (6-9-01, N41° 22.59', W72° 35.61') Photo by Dan Brock.