Campgaw Mountain is the northernmost ridge of the volcanically formed Watchung Mountains, straddling the border of Franklin Lakes, Oakland, and Mahwah in Bergen County, New Jersey, United States. Located almost entirely within the bounds of Campgaw Mountain Reservation, the mountain offers numerous outdoor recreational opportunities, including the only ski slope in the Watchungs. Campgaw Mountain is commonly considered to be part of the greater Ramapo Mountains region, but the flora and geology of the mountain is quite different from the surrounding area and more closely resembles the nearby Preakness Range to the south.