Distance from Atlanta, GA to Cumming, GA: ~42 Miles via GA-400

The drive from Atlanta, GA to Cumming, GA (Forsyth County seat) is approximately 42 miles (68 km) via GA-400 North (the "Alpharetta Highway").

Typical Travel Time

• Off-peak: 45–55 minutes
• Rush hour (AM/PM): 60–80+ minutes (GA-400 is a major commuter corridor)
• With stops: Add 10–15 min

GA-400 transitions from freeway to limited-access divided highway north of exit 10; the speed limit is 65–70 mph on the freeway section. Traffic cameras and Georgia 511 provide real-time conditions.