 The state highway heads east as two-lane undivided Black Dog Alley for a short distance before turning northeast onto Cordova Road and leaving the town of Easton.MD 309 heads north through a mix of farmland and forest parallel to an abandoned railroad grade owned by the Maryland Department of Transportation to the east of the road.After passing through the village of Cordova, the state highway intersects MD 303 (Tappers Corner Road).