New York–New Jersey Highlands New York–New Jersey Highlands The New York – New Jersey Highlands is a geological formation composed primarily of Precambrian igneous and metamorphic rock running from the Delaware River near Musconetcong Mountain, northeast through the Skylands Region of New Jersey along the Bearfort Ridge and the Ramapo Mountains, Sterling Forest, Harriman and Bear Mountain State Parks in New York, to the Hudson River at Storm King Mountain. The northern region is also known as the Hudson Highlands and the southern as the New Jersey Highlands. A broader definition would extend the region west to Reading, Pennsylvania, and east to the Housatonic
South Brunswick, New Jersey branches, the New York division of the Pennsylvania Railroad, the Rocky Hill and the Jamesburg and Freehold. The Lawrence Brook, a tributary of the Raritan River, flows through the township. Pigeon Swamp State Park is a New Jersey state park located on Deans Rhode Hall Road (Middlesex CR-610). The park has of undeveloped land. The township borders Cranbury Township, East Brunswick Township, Monroe Township, North Brunswick Township and Plainsboro Township in Middlesex County; Princeton in Mercer County; and Franklin Township in Somerset County. South Brunswick is in the humid continental climate zone. Average Winter-time high temperatures range from , and