For a KILLEr climb, start in Damascus and ride up to Feathercamp. For easier access, park at Beartree, and access from either the Lum Trail, or other trails going up the mt. from the camp ground. I highly recommend maps from local bike shops. THe old race course is a good ride, takes less than 2 hours to ride. Iron mt. trail is the OLD Appalachian Trail, so it's in pretty good shape, but it can get technical and rocky. Its a very nice alternative to the MUCH easier Virginia Creeper Trail.
Can access from downtown Damascus or from Beartree Recreation Area or other points. You can park on FS Road 90 in small pull-off area just off US 58, approx. 6 miles east of Damascus.
http://www.singletracks.com/item.php?c=1&i=1071