I could be wrong but I thought they used to have a 7 mile race around and through Backbone, but of course that one wouldn't be hilly.Yup, always the last hot and humid weekend of July. Haven't run it since I was your age back in 1986.Amazing how that race has endured as a BIG deal run. It's an odd ball distance at seven miles and a total bear of a hilly ***** of a course.
All I can find reference to is a 4 mile trail race, though.