This is a very rough elevation profile (Elevation in ft vs miles).  I tried to get elevations from the topographical map.  If you would like to view the course you can use the National Geographic map for the Mount Rogers Area (786).  There is a lot more elevation change than is shown on this gaph, but you can get an idea of what you will see.  The 50 milers will have approximately 8000 ft of gain and loss.

 

The 16 milers will do the first 9 miles and the last 8 miles of this graph.  The 30 milers will do the first 16 miles and the last 14 miles of this graph (or see the graphs below).

 

 

 

The following two graphs were made using data from a Garmin GPS unit (Forerunner 305).  I took data from the Garmin program and entered it in a spreadsheet and graphed it.  It is still a rough estimate of the elevation profile.  The graphs show Elevation (in ft) vs Distance (in miles).