The Gezer Nahshon Forests cover approximately 8,000 dunams in the west of the Judean Foothills. This is an area of low hills, built of soft white chalk rocks, which ascend to approximately 250 meters above sea level. The forest is divided into three main blocks:
Defenders' Forest (Ya'ar HaMeginim):
The main forest block. Stretches from south of Mishmar Ayalon and Karmei Yosef to the Latrun–Nahshon Junction road (Route 3).
Mishmar Ayalon Forest (Lehi Forest):
A patch of forest that lies east of Route 424.