Mount Tammany is a 1,526 ft / 465 m mountain peak near Belvidere, New Jersey, United States. Based on peakery data, it ranks as the 3rd highest mountain in New Jersey and the 49971st highest mountain in the United States. The nearest peaks are Mount Minsi, Laurel Hill, Fox Hill, Foxtown Hill, Kittatinny Mountain, and The Knob. See the Mount Tammany map, 3D fly around, and the Mt. Tammany photos to get a better sense of the mountain.