MacMillan Falls (sometimes known as Ramapo Falls) is a moderately sized waterfall at the popular Ramapo Valley County Reservation in Mahwah. The waterfall is extremely easy to get to, only about a half mile from the parking area, with generally flat terrain. Unfortunately, the waterfall is just downstream of the MacMillan Reservoir, a small body of water that restricts some of the flow of MacMillan Brook. For this reason, the waterfall may have less flow than one might expect, especially during the summer months, when it can be nearly dry. However, when it flows well, MacMillan Falls is very impressive.