A permit from the NC Botanical Garden is required to visit this preserve. They will give you further directions. Access to the parking lot involves first crossing a stream that may not be passable at times.
Also note that AllTrails has NCBG tagged in the map on the wrong side of Fordham Blvd.
This little reserve is a birding gem set not even a mile from downtown Chapel Hill. Go early and bring your binoculars for this one. It's very seldom used except on the weekends and provides a nice sanctuary for those seeking to connect with nature.