Loop circles Quartz Hill thru forest and thru lava flows on an eroded doubletrack. A few steep sections but mostly a farily easy ride.Start going left on FR 447 and about 300 yards up take doubletrack to right. You'll pass a doubletrack at 3.5 miles and continue up a steep, rocky section. You'll reach the saddle of Zuni and Bonita Canyons and bear left and continue to climb to left fork to another mine site. Descend across rolling terrain to Bonita Canyon. Left on 447 back to parking.