County Road 64 is a bi-county extension of SR 64 in Highlands and Polk Counties. It begins at SR 17 in Avon Park as East Main Street, which is part of SR 17 from the eastern terminus of SR 64. From there it runs straight west and east until the intersection with East Avon Pines Road, where it branches to the northeast, a position it maintains throughout the rest of the county. After crossing a bridge over Bonnet Creek, it crosses the Polk County Line[5] thus entering part of the Lake Wales Ridge State Forest, before curving east as it approaches a bridge over Arbuckle Creek, and terminating at the Avon Park Air Force Range.[6]
County Road 64A is an alternate county route of SR 64. It begins as a north-south road at the intersection with SR 64 in Oak Grove west of Zolfo Springs, and begins to curve to the northeast at the intersection of Alton Carlton Road, which leads to the Wauchula Municipal Airport. By the time it reaches the intersection of CR 35B, it runs directly west and east like its parent route and enters the City of Wauchula. Here, the road's only major intersection is CR 35A before it finally terminates at the intersection of US 17 and SR 636.[7]