*NOTE: After you turn onto Napier Road, you will make a loop back under a Natchez Trace overpass. This bridge has an 11' clearance. If your rig is taller, there is a small dirt bypass on the opposite side of Napier Road with a 13'6" clearance. To avoid underpass, take State Route 64 from East or West to Route 241. This will take you to the preserve entrance.