The Road to Vicksburg On the corner of Shiloh Road and Karnac Ferry Road, near Hwy 61 and about 8 miles from Grand Gulf County Claiborne Year of Marker Dedication 2013 This marker, Road to Vicksburg, is on the corner of Shiloh Road and Karnac Ferry Road, near Hwy 61 and about 8 miles from Grand Gulf.