Jupiter Peak road is a 1.2 mile one-way doubletrack trail that goes up from Guardsman's Pass and access some of the very tops of the peaks. This is a rocky, steep doubletrack with some hike-a-bike and some steep descending involved. Necessary for accessing some other trails in the area.
Start from the top of Guardsman's Pass.
http://www.singletracks.com/item.php?c=1&i=7516