Roanoke Mountain to Mabry Mill Professional Review and Guide
"One of the best things about the climb south, out of Roanoke, is that you have plenty of time to appreciate the views of Roanoke Valley. Between Mileposts 128 and 133, the Parkway climbs 1,800 feet with a 6.8% grade. Your breakfast will be long gone by the time you reach Smart View at Milepost 154.5. You can tell little about road grades along this stretch from studying the Parkway map.
It is not safe to assume that, since Rocky Knob is at 3,572 feet and Roanoke is at 1,425 feet, you will have smooth sailing traveling north into Roanoke. Although the map leads you to expect a drop in elevation of 2,147 feet, the Parkway actually rises and descends numerous times. Likewise, these climbs make for welcome descents."