 SR 56 intersects the Blue Ridge Parkway at Tye River Gap, where the highway enters Nelson County and becomes Crabtree Falls Highway.The state highway descends through Montebello and follows the South Fork of the Tye River past Crabtree Falls to Nash, where the highway begins to follow the Tye River proper.SR 56 leaves the national forest and enters more gentle terrain just west of Tyro, the site of the Tyro Mill.