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 State Park star, silky aster, and pasque flower. Wild turkey, white-tailed deer, coyote, and red fox are found in the park. Birdlife includes the turkey vulture, barred owl, rufous-sided (eastern) towhee, and the ovenbird. Exposed bedrock in the park is composed of lignite, shale, sandstone, and limestone, and dates to the Cretaceous period; it is rich in marine fossils. The park contains many miles of hiking and equestrian trails, and is a popular destination for day visitors, overnight campers, mountain bike enthusiasts, and picnickers. The northern part of Stone State Park extending from Woodbury County into Plymouth County is the Mount Talbot