An unsigned segment of CR 811 begins at an intersection with 45th Street (unsigned CR 702) and Greenwood Avenue, traveling north along Greenwood, which later becomes the President Barack Obama Highway. Both of these roads closely parallel the Florida East Coast Railroad, and are renamed segments of Dixie Highway. In Lake Park, it jogs across the railroad tracks to 10th Street, and transitions to SR 811 at an intersection with Northlake Boulevard, which carries the SR 850 designation to the east and the CR 809A designation to the west.