"The 24 Hours in the Sage course is roughly 13 miles (13 mile loop starting/ending at the KOA).
The course offers a variety of: climbs, flats, downhills and technical.
Most of the course is single-track trails with some dial/4wd trails in the form of connectors to the single-tracks.
Roughly 4 miles of the 13 miles is paved road (CR38/Gold Basin Road) that takes you from the KOA to the entrance of hartman rocks." (24hoursinthesage.com)