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
Portville, New York the county. Its eastern town line is the border of Allegany County, New York, and its southern town line is the McKean County, Pennsylvania, border. The Allegheny River flows through the south part of the town. Oswayo Creek joins the Allegheny south of Portville village, and Dodge Creek joins the river in the village. New York State Route 305 (running north-south) and New York State Route 417 (running east-west) pass through the town. Eldred and Ceres townships in McKean County, Pennsylvania, are south of Portville. The towns of Clarksville and Genesee in Allegany County form the eastern boundary. The town