State Route 306 is a west–east route located entirely in Forsyth County, Georgia

Forsyth County, Georgia

Forsyth County is a county located in the U.S. state of Georgia. The county seat is Cumming, Georgia. Forsyth County is a part of the Atlanta metropolitan area...

. From its western terminus at SR 20 west of Cumming

Cumming, Georgia

Cumming is a city in Forsyth County, Georgia, United States. The population was 5,430 at the 2010 census. However, places with a Cumming mailing address have a population of around 100,000...

, the route arcs north and west around downtown Cumming to SR 9. The routes cosign

Concurrency (road)

A concurrency, overlap, or coincidence in a road network is an instance of one physical road bearing two or more different highway, motorway, or other route numbers...

 north. SR 306 then departs SR 9 traveling to the east to its interchange at U.S. 19/SR 400 at US 19/SR 400's northernmost interchange. The route continues east through northern Forsyth County to reach its eastern terminus at SR 53 west of Lake Lanier

Lake Lanier

Lake Lanier is a reservoir in the northern portion of the U.S. state of Georgia. It was created by the completion of Buford Dam on the Chattahoochee River in 1956, and is also fed by the waters of the Chestatee River. The lake encompasses of water, and of shoreline at normal level, a "full...

.