The linked route starts and finishes in Gowansville, SC
Stats and major route features:
132 miles, 4.5 hour elapsed time
FS 475 in Pisgah
Green River Road
Link to Map view: http://ridewithgps.com/trips/1039911/full.png
Link to ride file with downloadable GPX: http://ridewithgps.com/trips/1039911#
Left Gowansville at 10:00 AM
Lunch stop in Brevard
Started with full tank and did not need to refuel.
I am using Michelin Anakee 2's and did not have any problems.
All road surfaces are maintained gravel - some surfaces were freshly scraped.