Stone Mountain Freeway Gwinnett County and have a partial interchange with Park Place Boulevard and Rockbridge Road. Just to the east of this interchange, the freeway ends and US 78/SR 10 continue to the east, locally known as Stone Mountain Highway. West of I-285, the speed limit is . East of the interchange with I-285, the limit rises to . Unlike Georgia's Interstate highways, the highway still has actual sequential exit numbers, rather than being mileage-based. There is no exit 6, which makes the exit numbering non-sequential. All of Stone Mountain Freeway is included as part of the National Highway System, a system
Stone Mountain State Park miles. The mountain offers some of the best rock climbing in North Carolina, and the park's creeks and streams feature excellent brook trout fishing. Because the mountain is the best example of a monadnock in massive granite in North Carolina it was designated a National Natural Landmark in May 1974. The park visitor center features the Mountain Culture Exhibit including mountain settler life and artifacts, and natural history including trout, butterflies and moths. The mid-19th century Hutchinson Homestead includes a log cabin, barn, blacksmith shop, corncrib, meat house, and original furnishings. The Homestead is open Thursday through Sunday from March