One of the few “official” trails in the Desert National Wildlife Refuge, this path follows an old Jeep road some 5.5 miles up into the Sheep Range. It goes all the way from the low-desert Joshua tree-creosote bush biome in the valley beyond the range front to a ponderosa pine forest, the “Hidden Forest.” The route follows a rugged, scenic canyon flanked by limestone spires and cliffs. An old cabin sits at the end of the trail, as well as Wiregrass Spring, one of the few perennial springs in the…