SC 430 begins at an intersection with SC 23 just northeast of Edgefield. The route heads northwest, cutting across the northeast part of the city. It then intersects U.S. Route 25 (US 25) in the northern part of the city. SC 430 then heads due north until it meets its northern terminus, at an intersection with US 378 on the southeastern edge of Sumter National Forest, in a rural part of the county.
SC 430 is not part of the National Highway System, a system of roadways important to the nation's economy, defense, and mobility.