Ringwood State Park is a 5000-acre (20 km²) state park in Passaic County in northeastern New Jersey, USA. The Park is located in the heart of the Ramapo Mountains in Ringwood. Its forests are part of the Northeastern coastal forests ecoregion.
It contains the New Jersey Botanical Garden at Skylands, historic Ringwood Manor and Skylands Manor, and the Shepherd Lake Recreation Area. The park is operated and maintained by the New Jersey Division of Parks and Forestry.
Skylands Manor, a forty-four-room English Jacobean mansion, was designed in the 1920s by John Russell Pope for Clarence McKensie Lewis, a wealthy stockbroker and civil engineer. The gardens were established by lawyer Francis Lynde Stetson, who owned Skylands from 1891 to 1922. The 96-acre (390,000 m2) botanical garden contains a variety of plants, evergreens and deciduous trees and shrubs. The landscaping includes a crabapple vista, terraced gardens, perennial and annual gardens and woodland paths. The extensive gardens offer views of the Ramapo Mountains. Skylands Manor is open for tours one Sunday per month March through November.
Ringwood Manor was home to a number of well-known ironmasters from the 1740s to the late 19th century. During the American Revolution, Robert Erskine managed ironmaking operations from Ringwood, and became George Washington's first geographer and Surveyor-General, producing maps for the Continental army; Washington visited the Manor House several times. Ringwood iron was used in the famous Hudson River Chain, and for tools and hardware for the army. One of the Manor's last owners was Abram S. Hewitt, ironmaster, educator, lawyer, U.S. Congressman, and mayor of New York City. The Manor is part of a National Historic Landmark District and is open for tours from Wednesday through Sunday year round from 10 am to 3 pm.