High Quality Content by WIKIPEDIA articles! The Preakness Range is a range of the trap rock Watchung Mountains on the western edge of the Newark Basin in northern New Jersey. A large portion of this range is included in High Mountain Park Preserve, offering miles of hiking trails with vistas overlooking New Jersey and New York City. The peaks of the Preakness Range, the highest of the Watchung Mountains, shelter endangered ecosystems, including perched wetlands and rare trap rock glade communities.