The North Forty Natural Area is located on the northern side of the airport, to the south of the Belt Parkway. It was formerly the Navy's munition storage area. The natural area contains a hiking trail, a natural woodland area, and a sandy area with shrubs. The freshwater Return-A-Gift pond, built circa 1980, is also located in the North Forty Area, near the clear flight path zone for Runway 12–30.
