50 Mile Route
If you would like to view the course you can use the National Geographic map for the Mount Rogers Area (786). The following elevation profiles are from Garmin Connect. More information can be seen at Garmin Connect. Sorry for the technical difficulties, but I am trying to edit the sizing of the 50 mile graph and I am having problems.
Garmin shows the total elevation gain (and subsequent loss) of about 8,600 feet for the 50 mile course.
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).
30 Mile Route
You can see more information at IMTR 30 at Gamin Connect including maps and satellite photographs. Garmin shows the total elevation gain (and subsequent loss) of about 5,200 feet for the 30 mile course. You can also data on the IMTR course from John Allsteadt at Ride with GPS.
16 Mile Route
At Garmin Connect you can see an 16 mile elevation profile with additional information available. Garmin shows the total elevation gain (and subsequent loss) of about 2,900 feet for the 16 mile course.