Some of us did this route on 1/29/11. Total GPS-measured elevation of 2,904, so pretty flat, but it's not the flatter-than-Clarksville route that we did 7/2/11. (Ignore the elevation shown on RWGPS -- it's wrong).
Anyone is welcome, but you'll need to be able to maintain at least a 17-18 mph pace for the whole 100 to stay with 4 of us that plan to stick together. Stop around mile 58 for some lunch.