Section 12 of the TransAm Trail begins in Christiansburg. Most of the roads through the Appalachians of central Virginia are narrow. After the town of Vesuvius, there is a four-mile climb onto the Blue Ridge Parkway. The hills continue along the  Parkway. No commercial traffic is allowed and the speed limit of 45 mph is strictly enforced. There are, however, no shoulders and there are a great number of recreational vehicles. After leaving the parkway, the gently rolling hills of the Tidewater are well-suited for cycling. You'll ride along the Colonial National Historical Park between Williamsburg and Yorktown, the TransAm Trail's ending point.