Mojave Desert; North Mojave Desert region: Southwest end of the Lava Mountains, north of Red Mountain, east of Trona Road. Side road off Steam Well Road (RM1444) to Skilling Well. Near 35.39090N, 117.56767W to 35.39745N, 117.564570W, Alt.:1034-1191m/3391-3905ft. Road ends near mines. General collecting along the lower ridge that climbes toward Klinker Mtn. Than returned down a small draw to the west of this ridge.