Bring plenty of water. The canyon gets very hot and dry.
The GSL is 100% singletrack and has a beautiful canyon lookout point at the one-mile mark. There are mile markers every tenth of a mile. Just past the mile overlook is Red Star Ridge (a neat rock formation). At this spot and at various other spots along the way one will find a bench.
By about 1.5 miles, the terrain become less challenging and more rolling. At nearly the terminus of the GSL is Little Fox Canyon Trail (2.3 mile loop not included in this route), which can be added to create a longer run. GSL ends at 3.08 miles and transitions to the Lighthouse Trail.