grass valley wilderness area
Grass Valley Wilderness Area. Parks âº California âº Ridgecrest Rec. Management Area âº Points of Interest âº Forest/Natural Area. Grass Valley Wilderness Area is a series of scattered hills, reddish-brown to yellow in appearance and gently rising to elevations from 200 to 600 feet above the desert valley floor. Vegetation is typical of a creosote bush scrub community with a number of Joshua trees. Some wildlife in the area are raptor foraging and desert tortoise, along with Mohave ground squirrel habitat. This wilderness is bisected with a vehicle corridor running north-south, and visitors must remain on this route if traveling in any sort vehicle.