Highway 158 divides Peachtree Road (sometimes spelled Peach Tree Road, sometimes labeled "Airline Highway" on old maps) into two major habitats. In birding lingo, Peachtree Valley is north of Highway 158, to the little hamlet of Lonoak, and Little Peachtree Valley is south of Highway 158, until Peachtree Road ends and Indian Valley Road begins. Peachtree Valley is mostly a wide grassland with the San Lorenzo River to the west and barren hills to the east, with only a very few scattered oaks near its south end. Little Peachtree Valley is much more wooded — lovely oak savanna, patches of chaparral, and denser live oak woodlands amongst hills and gorges—at the southern end. All for the property in both Peachtree Valley and Little Peachtree Valley is privately owned, and the only access is the public Peachtree Road.