Kentucky State Route 856 is a north-south highway on the eastside of Williamsburg. It connects to U.S. Rt. 25W at both ends and runs along Old Corbin Pike Road. This highway is just over two miles in length. KY St Rt 856 passes through the following town in Whitley County. Williamsburg KY St Rt 856 is not multi-plexed in Whitley County. KY St Rt 856 intersects the following highways in Whitley County. U.S. Rt. 25W, at Williamsburg. U.S. Rt. 25W, at Williamsburg.