Near the southern edge of Rockefeller State Park Preserve , NY 448 turn east and enter Kykuit , the estate of the Rockefeller family . At the hamlet of Pocantico Hills , the highway intersect with Lake Road and turn to the northeast , passing through more residential areas as it leave the estate . NY 448 pass the Pocantico Hills Central School on its way , continuing northeast towards Phelps Way ( NY 117 ) . The road continue through a vacant area and heads northward into Mount Pleasant , where NY 448 terminates at an intersection with NY 117 . Bedford Road continue east of this point as part of NY 117 .